As of late Saturday, about 230,000 customers were still without power, providers said. The two groups expect to be in Texas for at least two weeks or more. Tropical storm force winds extend outward up to 115 miles from the storm's center.
Harvey is the largest storm to hit the United States since the disastrous Hurricane Katrina in 2005. Central on Friday night, landing between Port Aransas and Port O'Connor.
The fiercest hurricane to hit the U.S.in more than a decade came ashore late Friday about 30 miles (48 kilometers) northeast of Corpus Christi as a mammoth Category 4 storm with 130 mph (209 kph) winds.
The coastal city of Rockport in Aransas County was severely damaged when the storm made landfall, and the mayor emphasized Saturday was not safe for residents to return.
Some eyewitness accounts stated that more people had died and media reports had earlier said three persons had been killed in connection with the hurricane.
He says he was on his porch when the hurricane - and tornadoes - came in from the sea and wiped out his street.
A mandatory evacuation order, while optional in practice for residents, triggers mandatory closures of businesses and cessation of industrial plant operations.
Some parts of the city of Houston the fourth biggest US city was fully submerged in the flooding that followed the storm
"Certainly if people can stay in their homes, they can do that", Austin Bleess, the Jersey Village City manager, said. The town has a population of about 3,800.
In 2008, Hurricane Ike squarely hit the barrier island near Houston, damaging or destroying 80 percent of Galveston's homes and killing 36 people in the area. Here's a look at the damage the Corpus Christi Caller-Times staff captured the morning after.
A statement released by Abbott added: 'President Trump called Governor Abbott to offer federal support for the State of Texas as Hurricane Harvey approaches the Gulf Coast.
The US Coast Guard said it had rescued 20 people from distressed vessels on Saturday, and was also monitoring two Carnival Corp cruise ships carrying thousands of people stranded in the US Gulf of Mexico due to the effects of the storm.
Tropical Storm Harvey poses less of a threat to New Orleans and Louisiana as a whole than it did a couple of days ago, said Gov.
Richard says they are lucky that only their roof has been damaged, their neighbours have suffered far worse.
The National Weather Service issued a flash flood emergency alert for the area around William P. Hobby Airport, and the airport said on Twitter that the arrivals section was flooded. A person was found dead in a vehicle in Houston on Saturday night in a possible drowning amid flooding in the city, a Houston fire department spokesperson said.