The largest city in Texas is facing what some meteorologists say is the worst flooding they have ever seen, as Harvey continues to barrel down the state’s southeast coast Sunday morning.

The National Weather Service has warned of “catastrophic” and potentially “historic” flooding in the Houston metropolitan area. Nearly two feet of rain had dropped on the city by early Sunday, with up to 15 to 25 additional inches expected.

Dramatic images shared on social media show vehicles, trees and traffic lights partially submerged, and parks buried in mud-colored water. Floodwaters continue to flow through residential streets, as well as more than 200 roads and highways.

Interstate 610 is desolate, and portions of it are completely underwater. This photo taken by Reuters shows one abandoned vehicle partially submerged:

Here’s part of I-610 from a traffic camera:

And here’s what Buffalo Bayou Park, a 124-acre green space just outside downtown Houston, looks like:

In at least one parking lot, the water was high enough for kayaking:

In at least one newsroom, reporters working Sunday had to move because water had seeped in:

A facility of the Houston Police Department is also flooded:

More than 1,000 water rescues had been reported as of Sunday morning. Drivers are abandoning their cars.

South Texas prepares for expected landfall of Hurricane Harvey

Thia NOAA-NASA GOES Project satellite image taken at 1737 UTC on August 24, 2017 shows storm activity off the south east coast of the US. A major storm, Harvey, was upgraded to hurricane status on August 24, 2017, as it targeted hundreds of miles of coastline in Texas and Louisiana. The US National Hurricane Center (NHC) warned of a potential for "life threatening" floods from the storm, which was due to make landfall sometime on August 25, 2017.The NHC said the category one hurricane could hit land as a much more powerful category three, with winds of 130 miles (209 kilometers) per hour. / AFP PHOTO / NOAA-NASA GOES Project / Handout / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO /NOAA-NASA GOES PROJECT/HANDOUT" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS HANDOUT/AFP/Getty Images (Handout/AFP/Getty Images)