Meanwhile, the US Army Corps of Engineers is starting to release water from two Houston-area reservoirs, which will cause flooding of homes in the surrounding communities, because the reservoirs have risen too quickly.
The US president plans to go to Texas tomorrow to survey damage from the storm, a White House spokeswoman said yesterday. Fourteen people have been injured.
"The National and State Guard have deployed 3,000 guard members", Abbott said.
The National Weather Service said the intense rainfall and flooding were unprecedented and "beyond anything experienced". Officials asked for help from restaurants to feed the growing population. The city's only other airport earlier stopped all flights due to flooded runways.
"There was kind of a rescue for a family".
Harvey struck at the heart of the country's oil and gas industry, forcing operators to close several refineries to close and evacuate offshore platforms.
There is no doubt the challenge will be huge for Houston, a city of 2.3 million residents. "We did what was the right thing to do".
It was a magnificent and troubling sight.
The impacts from Hurricane Harvey are just getting started on the Texas Gulf Coast, but the storm has already displaced thousands of people from their homes.
Comedian and actor Kevin Hart has challenged fellow celebrities to help Harvey victims. It's pretty solid construction here. Experts say the storm's destruction is probably just beginning. The Texans announced Sunday that they will practice Monday at the Cowboys' facility in Frisco, Tex.
Either way, rain bands are expected to rotate around Harvey through eastern Texas and western Louisiana.
"We're doing absolutely the best we can".More news: Tropical Storm Harvey makes landfall in Louisiana near Cameron
Within a couple of hours of launching his fundraising campaign on YouCaring.com, Watt had helped raise more than $160,000 of his $200,000 goal. If you are in a safe place, you are urged not to drive. The water is actually moving.
"This is serious. It is important that people stay off the roads", Houston Mayor Sylvester Turner said.
International Relief Teams - IRT is providing storm evacuees with personal hygiene kits, to be delivered early next week.
Some areas could get up to 100 centimetres of rain.
Like Houston, Galveston was also hit by "epic catastrophic flooding" overnight, the National Weather Service said.
Samaritan's Purse has positioned disaster relief materials and personnel in Texas and in order to move into the hardest-hit areas as soon as they have been given the all-clear by state authorities.
Harris County sheriff Ed Gonzalez said his deputies had also responded to unconfirmed reports of a deceased woman and child inside a submerged vehicle on a highway near Houston.
It was downgraded to a tropical storm Saturday afternoon but the National Hurricane Center warned the storm would cause a "multiday rainfall disaster" estimated to remain effective for five to six days.
The monster storm has claimed 10 lives so far.
The US Environmental Protection Agency eased rules on gasoline specifications late on Friday to reduce shortages. Put as many walls as possible between you and the outside.
Director Brock Long said in a statement that FEMA would be in the area "for years".