The National Weather Service is also keen to point out that this won't be over any time soon.

It says Texans should prepare themselves for days of extreme weather.

Here is its latest rainfall map.

Texas Governor Greg Abbott has been speaking to our partner channel CBS News, and warned of the potential for much more damage to come.

It's churning away, slower and slower - but is still hurricane strength about 12 hours after making landfall (this is unusual).

The National Weather Service has just put out an update, external, saying it's 25 miles (40km) west of Victoria, a small inland city of about 70,000 people.

It is moving at about 2mph and has slowed considerably over recent hours - the fact it is now slowing down is likely to be bad news, as it will dump large amounts of rain while it stalls.

On top of that, there are still winds of about 75mph.

Image source, NOAA

A homeowner in Corpus Christi has shot an intruder, police have confirmed.

The shooting happened about an hour after the hurricane made landfall in the city, according to local newspaper The Caller Times.

We'll keep on bringing you the latest images from Rockport, which appears to have borne the brunt of the winds. Our team is on its way there, but here are other pictures posted online.

The National Weather Service's outpost in Corpus Christi has just given an update on rainfall, external so far - worst-hit is an area near Austwell, a coastal town north-west of Corpus Christi.

The NWS says it has received 14.46in (36.7cm) of rain up to 08:00 local time (14:00 BST).

Two other areas have already received at least a foot of rain.

Jack Fischer is one American with a particularly good view of Harvey's power - he's one of the astronauts on board the International Space Station and just posted this image (as well as a message to Nasa colleagues in Houston).

Harvey - still a category one hurricane - is moving slowly inland, at about 6mph (9km/h) with winds of 75mph.

At the moment, it is not too far from Yorktown, a town of about 2,000 people. Harvey is expected to be downgraded to a tropical storm in the coming hours.

Reuters have been bringing live pictures from the Texas town - here are the latest images.

The US Coast Guard says it is responding to vessels in distress near the Lydia Ann Channel, near Port Aransas.

A mayday signal has been received from three tugboats: Belle Chase, Sandy Point and Sabine Pass.

Two helicopters have been sent in a rescue attempt from the coastguards' Corpus Christi base.

Image source, Getty Images

Firefighters are at the scene of a fire in Corpus Christi, where at least one building and various vehicles have been destroyed.

Image source, Getty Images

The Electric Reliability Council of Texas says that about 293,000 customers across the state are without power.

Utility company AEP Texas has mapped all the reported power outages. There are plenty of them. You can see where the current affected areas are here, external.

Image source, AEP Texas

Image source, AFP/Getty Images

The latest update from National Hurricane Center makes clear that storm surge is still a problem along parts of the Texas coast.

The NHC said that the sea Port Lavaca (a small city of about 10,000 people between Houston and Corpus Christi) was 6.2ft (1.9m) higher than normal.

Storm surge happens when low pressure at sea "lifts" tides to a level higher than normal and high winds then blow the water inland.

The advice from the Texan authorities is: "Turn around, don't drown."

The authorities are warning residents to not to attempt to drive or walk in floodwater.

No floods have been reported yet, but they have been predicted by forecasters.

James Cook
BBC News,, Corpus Christi

Harvey was pretty ferocious when it came ashore, with screeching wind all night. We saw a reasonable amount of damage being caused by debris flying through the air.

There's no sign though of any serious structural damage in the immediate vicinity here in Corpus Christi. But the main concern is for the town of Rockport, where the eye of the storm came ashore.

There is concern there about a number of buildings, in particular a shelter for the elderly from where people had apparently not been evacuated.

We're getting live shots coming in from the coast at Galveston in Texas - it's been hours since Harvey made landfall, but there's no sign of the winds or waves calming.

Galveston, of course, was the site of the deadliest natural disaster in US history, external, when a category four hurricane struck in September 1900, destroying the city and killing as many as 12,000 people.

At the moment, Harvey is located near Victoria, north-east of Corpus Christi - a city of about 60,000 people.

Victoria is one of the places that could get up to 40in (one metre) of rain, and while the National Weather Service says reports the city already received about 16in of rain are probably not correct, it's clear from this video that Victoria is getting a lot of rain right now.

Francisco Sanchez, a spokesman at Harris County Homeland Security and Emergency Management, has spoken to BBC Newshour from Houston. He said he is communicating with colleagues throughout the area but that it is too early to do a damage assessment.

He said national guardsmen and reservists are positioned throughout the state, ready for deployment where needed.

He also reminded people only call 911 if they have a significant or life-threatening emergency.

This footage was filmed on Friday, before Harvey made landfall. It was posted by the 53rd Weather Reconnaissance Squadron - the so-called "hurricane hunters" that are an arm of the US Air Force.

(If you watched this and thought it looked alarmingly calm and the sky looked surprisingly blue above, it's because this was filmed in the calm of the eye...it's a lot rougher outside the eye)