6 p.m.
Texas Gov. Greg Abbott is adding four east Texas counties to the 54 southeast Texas counties already covered by his Hurricane Harvey disaster declaration.
The Republican on Monday added Angelina, Trinity, Sabine and Orange counties to the counties already declared disaster areas. The declaration makes it easier for the state to manage resources essential for search, rescue and relief.
5:30 p.m.
A meteorologist has calculated that by the end of Wednesday Harvey will have saturated southeast Texas with enough water to fill all the NFL and Division 1 college football stadiums more than 100 times over.
Ryan Maue of WeatherBell Analytics says that already 15 trillion gallons of rain have fallen on a large area, and an additional 5 trillion or 6 trillion gallons are forecast by the end of Wednesday.
An Army Corps of Engineers official said Monday that Harvey is bringing amounts of rainfall seen only once in 1,000 years.
Edmond Russo, a Corps deputy district engineer for Texas, made the comment at a Houston news conference Monday.
Two dams — at Barker Reservoir and Addicks Reservoir — protecting downtown Houston and under the Corps' management are built to withstand 1,000-year floods. Some levees in outlying areas are designed to protect against flooding that happens every 100 or 200 years.
Meteorologists say that sometime Tuesday or early Wednesday parts of the Houston region will break the nearly 40-year-old U.S. record for the biggest rainfall from a tropical system — 48 inches, set by Tropical Storm Amelia in 1978 in Texas.
5 p.m.
The National Hurricane Center says Harvey has slightly increased in strength as it went back to warm waters of the Gulf of Mexico.
It now has sustained winds of 45 mph, up 5 mph.
Forecasters expect Harvey to stay over water and at 45 mph for 36 hours and then head back inland east of Houston sometime Wednesday. The forecast has the storm then zipping north and losing its tropical storm strength and then its tropical characteristics.
Harvey made landfall in Texas late Friday as a Category 4 hurricane and has lingered just off the coast.
4:20 p.m.
Officials say the ongoing release of water from two flood-control reservoirs in the Houston area is not expected to increase the levels of a swollen bayou that runs through heavily populated neighborhoods in west and central Houston and through the city's downtown.
Buffalo Bayou has swollen due to torrential rain from Harvey.
Jeff Lindner is a meteorologist with the Harris County Flood Control District. He said Monday that levels on Buffalo Bayou have fallen from where they were Sunday. He says they're holding steady despite the ongoing release of water from the Addicks and Barker reservoirs in west Houston.
The Army Corps of Engineers says the controlled release into Buffalo Bayou is being done to relief pressure on the two aging reservoirs. The Corps says if the releases weren't done, excess water could go over the reservoirs' spillways and flood a large area.
3:55 p.m.
Authorities say a woman has been killed in the Houston area when a large dislodged by heavy rains from Harvey toppled onto her trailer home.
Montgomery County sheriff's office Capt. Bryan Carlisle says that the woman was killed around noon Monday in Porter. Her husband has reported that she was napping when the tree fell. Porter Fire Department firefighters had to wade through chest-level water to evacuate the woman's husband, remove the tree and extract the body.
Harvey made landfall in Texas late Friday as a Category 4 hurricane and has lingered just off the coast, dropping heavy rain as a tropical storm.
3:25 p.m.
Volunteers have used a dump truck to rescue about 20 people from a flooded Houston-area neighborhood.
The rescue effort happened Monday after some residents of Sugar Land got a constable's attention to say they needed help to escape the waist-deep water. The officer managed to arrange a private truck.
Several residents then used small rafts and air mattresses to float out to the vehicle. Children were handed from one person to another to be loaded into the back of the truck.
The truck then headed to dry land at a minor league baseball park that's been opened up as a staging area for people to evacuate.
Volunteers on personal watercraft and in kayaks also helped evacuate people from the subdivision threatened by the fast-swelling Brazos River.
3 p.m.
Houston Mayor Sylvester Turner says the city is working on opening another "major" shelter for people fleeing flooding from Harvey as the George S. Brown Convention Center reaches capacity.
Turner toured the convention center Monday, hugging evacuees and asking how they were doing. The convention center was already more than halfway to its 5,000-person capacity.
Turner said the city was considering its options for another major shelter, but did not say which buildings could be used.
2:50 p.m.
Republican Texas Gov. Greg Abbott is again praising the federal government's response to Harvey.
Abbott said at a news conference in Corpus Christi, Texas, on Monday that he had spoken "on multiple occasions" to President Donald Trump and members of his Cabinet.
Abbott said, "I would have to grade the federal government's response as an A-plus." He said the storm was "if not the largest, one of the largest disasters America has ever faced." But he says, "to see the swift response from the federal government is pretty much unparalleled."
Abbot expressed similar sentiments Sunday. It's a departure for Abbott. He was elected governor in 2014 decrying federal "overreach" and boasting about using his former positon as Texas attorney general to sue the Obama administration nearly 30 times.
2:40 p.m.
Officials are preparing to evacuate one of the nation's busiest trauma centers as flooding from Harvey threatened to compromise the hospital's supply of medicine and food.
A spokesman at Houston's Office of Emergency Management said Monday that all 350 patients at Ben Taub Hospital would be evacuated, hopefully within a day. Floodwater and sewage got into the main hospital building's basement and affected pharmacy, food service and other key operations. Patients will be sent to other area hospitals until repairs are made.
The University of Texas MD Anderson Cancer Center also canceled outpatient services, appointments and surgeries at all Houston-area locations through Tuesday and was asking patients not to attempt to travel because of high water in the Texas Medical Center area.
2:35 p.m.
A mandatory evacuation has been ordered for a Southeast Texas city of about 20,000 that's been inundated by Harvey floodwaters.
Dickinson police announced the city's mandatory evacuation that took effect at 2 p.m. Monday.
Dickinson is a low-lying city about 30 miles southeast of Houston. It's along Dickinson Bayou. Crews on Sunday rescued more than 20 residents and staff members from an assisted-living center in Dickinson that flooded.
The police statement cited the fragile infrastructure in the city amid flooding, limited working utilities and concern for the forecast track of Harvey. Transportation was available for those needing help leaving Dickinson.
2:30 p.m.
The Federal Emergency Management Agency says its response to Hurricane Harvey is "quickly drawing down" the reserves in the agency's disaster fund.
FEMA says it's prioritizing its response to Harvey over earlier disasters to stretch the life of its disaster aid fund to make sure it doesn't run out of money.
In a message to Capitol Hill, FEMA says it will only fund immediate emergency response "so that FEMA can continue its focus on response and urgent recovery efforts without interruption."
FEMA's most recent report says it has more than $3 billion in its disaster fund. About half of that was supposed to be spent to respond to earlier disasters, but Monday's announcement frees up more of the money for responding to Harvey.
2:10 p.m.
A television station is reporting that six family members are believed to have drowned in Houston when their van was swept away by floodwaters.
The KHOU-TV report was attributed to three family members the station didn't identify. No bodies have been recovered.
Houston police Chief Art Acevedo tells The Associated Press he has no information about the KHOU report but added that he's "really worried about how many bodies we're going to find" from Harvey's devastating flooding.
According to the station, four children — the youngest, a 6-year-old girl — and their grandparents are feared dead after the van hit high floods Sunday afternoon when crossing a bridge in Greens Bayou.
The driver of the vehicle, the children's great-uncle, reportedly escaped before the van was submerged and grabbed onto a tree limb as the van sunk. He told the children inside to try to escape through the back door, but they were unable to get out.
2 p.m.
Former President George W. Bush says he and former first lady Laura Bush are confident that communities hit by Harvey "will recover and thrive."
Bush, who lives in Dallas, released a statement Monday that he and his wife are "proud of the people of Texas for showing the resilience and compassion of our state." He says they're "moved by the heroic work of the first responders and volunteers who are putting themselves at risk to save others."
Harvey made landfall in Texas late Friday as a Category 4 hurricane and has lingered just off the coast, dropping heavy rain as a tropical storm.
1:45 p.m.
Texas regulators say a 6.3 million-gallon fuel storage tank spilled an unspecified amount of gasoline east of Houston after tilting over due to large volumes of rain from Harvey.
The spill occurred at Kinder Morgan's Pasadena Terminal on Saturday. Ramona Nye with the Texas Railroad Commission says the fuel was captured by a containment dike at the facility and fire-retardant foam was sprayed over it to prevent an ignition. Company representatives did not immediately respond to a request for comment Monday.
In a second incident, a fiberglass storage tank operated by Karbuhn Oil Co. burst into fire after being hit by lightning early Sunday morning. Nye says an estimated 210 gallons of oil was released.
Harvey made landfall in Texas late Friday as a Category 4 hurricane and has lingered just off the coast, dropping heavy rain as a tropical storm.
1:35 p.m.
The National Hurricane Center says Harvey is drifting "erratically" back toward the Gulf Coast after having moved inland since making landfall late Friday.
An advisory Monday afternoon from the center says life-threatening flooding continues for Houston and the broader southeastern Texas region.
Harvey has maximum sustained winds of 40 mph. The center says it may slowly intensify as it moves closer to the coast.
Harvey is forecast to turn back toward the northeast at some point Tuesday.
An additional 25 inches of rainfall is forecast through Friday, and the center says other threats include tornadoes and a coastal storm surge of 1 to 3 feet moving inland from the coast.
1:10 p.m.
The U.S. Army Corps of Engineers rates the two 70-year-old dams that protect Houston as among a handful of "extremely high risk" dams in the U.S.
Concerns include the way the two structures were built in the 1940s and the threat to the people and property of the nation's fourth-biggest city if they were to fail.
The Corps said Monday it was starting to release water from the two dams, called Addicks and Barker. The move would worsen flooding in some neighborhoods but was necessary to prevent bigger, uncontrolled flows later, the Corps said in a statement.
The Houston dams are older than even the already high average age — 56 years — of dams in the United States. The Corps has acknowledged a long history of seepage through the dams. A $75 million fix to the two dams' floodgates is slated for completion in 2019.
The Corps "was confident that the structures continue to perform as they were designed to do," it said in Monday's statement.
12:40 p.m.
Officials say Houston's 911 system has received and processed 75,000 calls since Harvey inundated many parts of the city.
That includes nearly 20,000 calls just since 10 p.m. Sunday.
Joe Laud is the administration manager for the Houston Emergency Center. He said Monday that 911 operators have been able to reduce the backlog of calls they have, going from 120 to 250 calls in their queue to 10 to 15 calls.
He says that on average, the system usually get 8,000 or 9,000 calls per day.
Laud says officials have also initiated a voice activated system that lets callers know that the 911 system has received their call and that they should stay on the phone until someone comes on the line. Laud says some people were apparently hanging up because they didn't think their call would be answered.
Harvey made landfall late Friday as a Category 4 hurricane and has lingered just off the coast, dropping heavy rain as a tropical storm.
12:20 p.m.
The federal government has enough disaster aid money to deal with the immediate aftermath of Harvey — for now.
But a multibillion dollar aid package is a sure bet to be added to an already packed agenda facing lawmakers when they return to Washington next week.
Top Capitol Hill aides say they have assurances from the Trump administration that the $3 billion balance in the Federal Emergency Management Agency's disaster fund is enough to handle immediate needs, such as debris removal and temporary shelter for thousands of Texas residents displaced from their homes.
An infusion of more FEMA money will be needed soon, however, given the magnitude of the storm. It's seen as a likely add-on to a temporary government-wide funding bill to prevent a shutdown in October.
12:10 p.m.
U.S. Sen. Ted Cruz says he won't second-guess the decision not to ask Houston residents to evacuate before Harvey hit the city with heavy rain and wind.
The Texas Republican on Monday toured the downtown convention center housing thousands of evacuees. He says there will be "plenty of time after this disaster to look back in hindsight and see what lessons could be learned."
Cruz said that the government "will do what is necessary to rebuild," though he didn't commit to voting for potential legislation to provide funding for the recovery.
Cruz wouldn't comment on criticism from U.S. Rep. Peter King, a New York Republican, that he didn't vote for an aid package for Superstorm Sandy.
Cruz said, "This is not a time for politics."
12 p.m.
Houston's mayor says city officials are keeping watch on the ongoing release of water from two flood-control reservoirs in the Houston area to see if it might cause additional flooding in some neighborhoods.
The Army Corps of Engineers says the controlled release into Buffalo Bayou is being done to relief pressure on the Addicks and Barker reservoirs, which have been overwhelmed by flood waters from Tropical Storm Harvey. The reservoirs help prevent flooding in downtown Houston and other urban areas to the east.
The release of water is expected to flood some neighborhoods near the reservoirs. And officials are worried that other homes in areas near Buffalo Bayou, which had gone out of its banks, could be affected as well.
Houston Mayor Sylvester Turner says he's asking the Harris County Flood Control District for more information on how much higher Buffalo Bayou could rise and whether that could result in more homes in west Houston being flooded.
11:55 a.m.
Officials in Houston are working to pump out water from one of its water treatment plants, which has been submerged by rainfall from Harvey.
Houston Mayor Sylvester Turner said Monday that the plant, in the northeast part of the city, remains operational.
Turner said most of the Houston water supply will be OK. But if the plant drops to below 20 percent capacity, the city might be forced to issue a notice to residents to boil their water.
Officials say because the plant is under water, it is difficult for workers to get equipment to the site and to do any adjustments and maintenance.
Harvey made landfall late Friday as a Category 4 hurricane and has lingered just off the coast, dropping heavy rain as a tropical storm.
11:40 a.m.
Water in a Houston-area neighborhood along a creek that's overflowing has reached the roofline of single-story homes.
People can be heard yelling for help from inside homes in the Cypress Forest Estates subdivision in northern Harris County as a steady procession of rescue boats head into the area.
One man, Joe Garcia, wearing a blue jacket and a New York Mets cap, was carrying his German Shepherd, Heidi, in chest-deep water before he was picked up by a boat. Garcia said he floated out a tub of his belongings, then went back in to get his dog.
The current is swift, and the waters have continued to rise Monday.
11:15 a.m.
Texas' governor is activating the entire Texas National Guard for search and rescue efforts after Hurricane Harvey, bringing the total deployment to roughly 12,000.
Gov. Gregg Abbott said Monday that it's "imperative we do everything possible" to protect lives. About 3,000 guard members had already been mobilized along the Texas coast.
Abbott says Texas is now activating others who are physically able and not currently deployed elsewhere.
Houston officials say they have rescued more than 2,000 people from flooding in the city. Harvey made landfall on Friday as a Category 4 hurricane.
10:50 a.m.
Houston officials say fire personnel have responded to more than 5,500 calls for service in the city since Harvey began pounding the area this weekend.
Fire Chief Samuel Pena said during a news conference Monday that hundreds of emergency responders from across Texas and beyond are coming to Houston to help with rescue operations.
Mayor Sylvester Turner said at the same news conference that about 5,500 people have moved into city shelters. About half of them are at the George R. Brown Convention Center.
Police Chief Art Acevedo added that police officers from several states will augment Houston police efforts, particularly in light of concerns with looting.
Acevedo said four people had been arrested on looting charges as of Monday morning.
10:40 a.m.
Former President George H.W. Bush and former first lady Barbara Bush are expressing their support for Texas residents affected by Harvey.
The Bushes live in Houston but also have a home in Maine, which is where they're staying.
In a statement issued Monday, they say they're praying for people in Texas. They praised people who are helping their neighbors, as well as the first responders and local elected officials "for their grit and determination in the face of this extraordinary storm."
The statement concludes, "This we know: Houston, and Texas, will come together and rebuild."
Harvey made landfall late Friday as a Category 4 hurricane and has lingered just off the coast, dropping heavy rain as a tropical storm. The slow-moving storm has caused catastrophic flooding in Texas.
10:10 a.m.
Houston police Chief Art Acevedo says authorities have rescued 2,000 people from flooding in the city.
Acevedo says the city has 185 critical rescue requests still pending as of Monday morning. He says the goal is to rescue those people by the end of the day.
The comments came at a news conference where officials provided updates on Harvey, which is still pouring rain on the Houston area.
Harvey came ashore late Friday about 30 miles northeast of Corpus Christi, Texas, as a Category 4 hurricane but has since been downgraded to a tropical storm. The slow-moving storm has caused catastrophic flooding in Texas.
9:40 a.m.
The shelter set up inside the George R. Brown Convention Center in downtown Houston has already reached half its capacity.
Ken Sandy, a shelter manager for the American Red Cross, said Monday that more than 2,600 people took shelter in the George R. Brown Convention Center. Organizers with the Red Cross estimate the convention center can accommodate roughly 5,000 people.
Sandy says the shelter is currently out of cots and waiting for more to arrive.
With Tropical Storm Harvey still pouring rain on the Houston area, thousands more people are expected to need to evacuate their homes.
The Red Cross has also set up other shelters throughout the area.
9:20 a.m.
First lady Melania Trump will join President Donald Trump on his trip to storm-battered Texas.
The first lady's spokeswoman Stephanie Grisham said on Twitter Monday: "@FLOTUS will travel to #Texas w @POTUS this week."
The White House has said Trump will travel to Texas on Tuesday. More details of the trip have not yet been released.
Harvey is the first major natural disaster of Trump's presidency and a significant test for a White House that is often chaotic and rife with infighting.
9:05 a.m.
A major South Texas airport has reopened after being closed due to Harvey.
A city statement said Corpus Christi International Airport resumed commercial air service Monday. Harvey made landfall as a Category 4 hurricane late Friday about 30 miles from there.
Two other major airports in the region, George Bush Intercontinental Airport and Hobby Airport in Houston, remain closed as heavy rain and flooding continue. Both have been shut down since midday Sunday as Harvey-related flooding swamped roads leading to the airports
8:55 a.m.
A Houston-area official says hundreds of people who've been rescued from their homes, vehicles and other places amid catastrophic flooding are being taken to dry land but not straight to shelters.
Harris County Judge Ed Emmett is the top administrator for the county that's home to Houston. He said at a news conference Monday that many people are being ferried to a parking lot, school or other dry area as rescue personnel move on to the next rescue that's needed. Those people then are struggling to find shelter, food and other resources.
Emmett says the focus now is on getting those people to shelters.
Meanwhile, Houston police Chief Art Acevedo on Monday told "Good Morning America" that he knows of 200 to 250 water rescues that still must be done in the city and that he hopes they'll be completed by the end of the day
8:35 a.m.
Vice President Mike Pence is stressing that the federal government will support Harvey recovery efforts going forward.
In an interview with Houston radio station KTRH Monday morning, Pence said the federal government will make the resources available to see Texas through rescue operations and recovery.
Pence noted that given the "magnitude of the flooding" that "it will be years coming back."
The vice president stressed that President Donald Trump has been "continuously engaged" on Harvey, noting that it is still the "beginning of the effort." He said details of Trump's visit to Texas will be "forthcoming."
8:30 a.m.
President Donald Trump has issued a federal emergency declaration for Louisiana as a storm that's flooded Houston dumps heavy bands of rain on that state.
Trump's emergency declaration on Monday initially covers five parishes in southwest Louisiana: Beauregard, Calcasieu, Cameron, Jefferson Davis and Vermillion.
A White House statement says the action authorizes the Federal Emergency Management Agency to coordinate disaster relief efforts in those counties related to Harvey. The declaration also authorizes the federal government to cover 75 percent of costs of certain emergency protective measures.
Louisiana Gov. John Bel Edwards says lifesaving efforts including search and rescue and shelters will be needed, especially in southwest Louisiana where forecasters say 10 to 20 inches of rain could fall.
Harvey came ashore late Friday about 30 miles northeast of Corpus Christi, Texas, as a Category 4 hurricane. The slow-moving storm has caused catastrophic flooding in Texas.
8 a.m.
Emergency vehicles made up most of the traffic in downtown Houston on what would have normally been a busy start of the work week.
Due to Harvey, the usually bustling business area was mostly deserted Monday morning.
The water had receded from parts of downtown Houston, near Buffalo Bayou, which flooded over the weekend from the lingering tropical storm. That situation could change as officials have started releasing even more water from reservoirs overwhelmed by Harvey.
About half of downtown Houston had no working traffic signals. Most businesses, including restaurants, were closed due to the storm.
Harvey came ashore late Friday about 30 miles northeast of Corpus Christi, Texas, as a Category 4 hurricane. The slow-moving storm has caused catastrophic flooding in Texas.
7:50 a.m.
Louisiana's governor is asking President Donald Trump for a federal emergency declaration for Louisiana since forecasters expect Harvey to cause significant damage in the state.
Gov. John Bel Edwards said he sent a letter to the White House requesting the initial disaster declaration for five parishes in southwest Louisiana, and could add more areas to the request later.
Edwards said life-saving efforts such as search and rescue and shelters will be needed, especially in southwest Louisiana where forecasters say 10 to 20 inches of rain could fall.
Harvey came ashore late Friday about 30 miles (48 kilometers) northeast of Corpus Christi, Texas, as a Category 4 storm. The slow-moving storm has caused catastrophic flooding in Texas.
7:15 a.m.
The director of the National Weather Service is warning that the catastrophic flooding that's overwhelming Houston and other parts of Texas will worsen in the coming days and then be slow to recede once Harvey finally moves on.
Director Louis Uccellini said during a news conference Monday that up to 20 inches of rain could fall in the coming days, on top of the more than 30 inches some places have already seen.
He says some of the heaviest rainfall today, at a pace of 6 inches an hour, will fall east of Houston in places such as Beaumont and Lake Charles, Louisiana.
He adds that while Houston is experiencing a break from the rain Monday morning, heavy rainfall is forecast to return later in the day into Tuesday.
7:05 a.m.
The Houston police chief is concerned about the prospect of more flooding, but is "keeping (his) fingers crossed" that the rain will subside.
In an interview Monday on MSNBC's "Morning Joe," Chief Art Acevedo says drainage is a concern.
He says he's "not sure where the water is going because it's just so much that we can't really absorb more in the ground at this point. ... We have way too much water and not enough places for it to drain."
He says officers have voiced frustration that they don't have enough high-water vehicles to quickly help everyone who is stranded.
He also warned any criminals who might try to take advantage of the disaster that his force has already arrested half a dozen people for looting.
7 a.m.
The Federal Emergency Management Agency is asking for volunteers to help Texas recover from Harvey.
William "Brock" Long, FEMA administrator, told a news conference in Washington Monday that "we need citizens to be involved," because the storm and resulting flooding is greater than the government can handle.
Long urges individuals and organizations to check the website www.nvoad.org or call 1-800-621-FEMA to find out how to help. He's asking for financial donations and for people "to figure out how to get involved as we help Texas find a new normal."
A National Weather Service official says the peak flooding from the Houston-area storm is expected to max out Wednesday and Thursday, but said the floods will be slow to recede and that catastrophic flooding will persist.
4:25 a.m.
Harvey continues to head back toward the Gulf of Mexico at a slow pace.
The National Hurricane Center says in its 4 a.m. update that the tropical storm that made landfall late Friday as a Category 4 hurricane, dropping heavy rain in the Houston area, still has sustained winds of up to 40 mph and is centered 20 miles east of Victoria, Texas, about 120 miles southwest of Houston. It continues to creep to the southeast at 3 mph.
That means it remains virtually stalled near the coast and continues to drop heavy rain on the Houston and Galveston areas. In the past 48 hours, numerous spots in the region have measured more than 25 inches of rain.
The hurricane center says Harvey's center was expected to drift off the middle Texas coast on Monday and meander offshore through Tuesday before beginning "a slow northeastward motion." The center says those in the upper Texas coast and in southwestern Louisiana should continue to monitor Harvey's progress.
3:38 a.m.
Houston officials continue to urge people to shelter in place and stay off flooded roadways as Harvey continues to batter the nation's fourth-largest city.
Public Information Officer Keith Smith also says Sunday that rescue efforts continue and now are focused on those who feel trapped inside a home or building.
Smith says the city's 911 emergency response system has been challenged by sharply increased call volumes since the tropical storm made landfall late Friday as a Category 4 hurricane. He says during a typical 24-hour period, the emergency response system receives about 8,000 calls. But during a 17-hour period following Harvey's landfall, more than 56,000 911 calls were received.
2:11 a.m.
As the nation's fourth-largest city braced for more rain and rescues, officials started releasing even more water from reservoirs overwhelmed by Harvey even though the move aimed at protecting downtown Houston could make already devastating flooding worse around thousands of homes.
The strategic engineering move began early Monday. Harvey, which made landfall late Friday as a Category 4 hurricane and has lingered dropping heavy rain as a tropical storm, sent devastating floods pouring into Houston Sunday as rising water chased thousands of people to rooftops or higher ground and overwhelmed rescuers who could not keep up with the constant calls for help.
Jeff Lindner, a meteorologist for the Harris County Flood Control District, says residents affected by the release should pack what's needed and leave when the sun comes up.