Hurricane Harvey moved into Texas as a Category 4 hurricane over the weekend, and has since been downgraded to a tropical storm. Despite being downgraded, Harvey is still the strongest storm to hit the United States since Charley in August 2004 and the most powerful to hit Texas since Hurricane Carla in 1961.
The National Weather Service predicted that as much as 50 inches of rain has fallen in some areas, and at least five deaths have been reported.
Perhaps the hardest hit area has been Houston, the most populous city in the state, with millions being affected by flash flooding. And the unfolding disaster has been chronicled online, with citizens sharing photos from throughout the city. One tweet by Matthew Sitkowski of The Weather Channel has those of us outside the city concerned...
Yes, that's the I-610 freeway completely submerged. And that's just the beginning of it. Here's a comparison of the highway on a normal day...
One photo showed residents of a nursing home, who were eventually evacuated.
While this video showed the moment a reporter saved a truck driver's life.
Texas Governor Greg Abbott said about 250 roads and motorways had been closed as a result of flooding:
"We are dealing with a triangle of ongoing rain, including Houston, Victoria and Corpus Christi cities," he added.
"We will continue receiving incredibly heavy rain."
Houston Mayor Sylvester Turner urged residents not to call emergency services unless their life is in danger. "Don't get on the road. Don't assume this storm is over," he added. Officials in Harris County went on to ask people who own boats to help with rescues.