In picturespublished at 12:16 British Summer Time 26 August 2017
How are Texans coping so far? We have put together this set of images.
Summary
Hurricane Harvey made landfall in Texas as a category four storm
Harvey - now a tropical storm - was the most powerful to hit the US in 13 years
Town of Rockport, where hurricane made landfall, badly damaged
Winds of up to 130mph (215 km/h) have battered coastal areas
President Donald Trump has signed a disaster proclamation for the state
A warning has been issued for record flooding in many regions
In picturespublished at 12:16 British Summer Time 26 August 2017
'Mark your arm'published at 12:12 British Summer Time 26 August 2017
Rockport Mayor Patrick Rios had a stark warning for anyone who refused to leave town: "We're suggesting if people are going to stay here, mark their arm with a Sharpie pen [permanent marker] with their name and social security number."
Houston forecastpublished at 12:08 British Summer Time 26 August 2017
This is what the US National Weather Service forecasts for the next five days.
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End of twitter postFire engulfs three buildingspublished at 12:06 British Summer Time 26 August 2017
Three buildings in Bolivar Peninsula were destroyed by fire as the hurricane whipped up the flames.
Media caption, Wind-whipped flames engulf buildings in Texas
Rockport bears the bruntpublished at 12:05 British Summer Time 26 August 2017
The town of Rockport appears to be hardest hit. Emergency services say a school, a hotel, a housing complex for senior citizens and other buildings have all suffered structural damage. Tens of thousands of homes are without power.
Damage on the streets of Corpus Christipublished at 11:59 British Summer Time 26 August 2017
The storm has already brought down trees and cut power in the coastal city of Corpus Christi.
Image source, Getty Images
Image source, Getty ImagesDowngraded but fearsomepublished at 11:57 British Summer Time 26 August 2017
Harvey hit Texas as a category four storm. It has now been downgraded to a category one, but it is, however, capable of causing much damage, with winds in the region of 90mph (145km/h). The latest update, external from the US National Hurricane Center for instance ) cites a total of 16.43in of rain (24cm) falling in Victoria, Texas, in the past 24 hours alone.
This storm is terrifyingpublished at 11:56 British Summer Time 26 August 2017
James Cook
BBC's North America CorrespondentThis is how our correspondent in Corpus Christi described Harvey as it made landfall:
As we approached this coastal city across a series of causeways and bridges, darkness was falling and the flooding was already beginning, with frothing waves eating at the road.
At one point our car was blown sideways across several lanes by the force of the wind, and every few minutes a bolt of lightning would illuminate the sky with an eerie green flash.
By the time the eye of the storm was making landfall just 30 miles up the coast we were hunkered down inside a hotel, listening to the noise of screeching wind punctuated by the occasional crash.
I watched from a doorway at the side of the hotel as the wall of a large metal building under construction came smashing to the ground.
Thick palm trees have also been brought down and by the glow of street lamps and the flashes of lightning, you can see that the air is thick with driving spray.
This storm is powerful, it is dangerous and it is terrifying.
Harvey hitspublished at 11:53 British Summer Time 26 August 2017
Hurricane Harvey has hit the US state of Texas - the most powerful to hit the US mainland for more than 10 years. Up to 40in (1m) of rain is expected to fall.
President Donald Trump has signed a disaster proclamation for the state, which will free up federal aid for the worst-affected areas.
Texas Governor Greg Abbott has warned of record flooding in many areas.
We will be updating you with the latest throughout the day.