Overnight thunderstorms cause some flooding, leave Houston roads covered in water

A passenger in a vehicle traveling northbound on I-45 looks at the flooded intersection of West Mount Houston Road and North Freeway Service Road Tuesday, Aug. 8, 2017, in Houston. A passenger in a vehicle traveling northbound on I-45 looks at the flooded intersection of West Mount Houston Road and North Freeway Service Road Tuesday, Aug. 8, 2017, in Houston. Photo: Godofredo A. Vasquez, Houston Chronicle Photo: Godofredo A. Vasquez, Houston Chronicle Image 1 of / 113 Caption Close Overnight thunderstorms cause some flooding, leave Houston roads covered in water 1 / 113 Back to Gallery

The National Weather Service has issued a Flash Flood Warning for parts of Harris County after heavy overnight rains left much of Houston soggy Tuesday morning.

Thunderstorms dumped as much as 6 inches of rain on parts of Houston, with the heaviest concentration falling west and north of downtown.

Hardest hit were the northwest suburbs, including the Katy area, Mission Bend and Copperfield Place, near Jersey Village, some of which got up to 8 inches of rain overnight, said Charles Roeseler, meteorologist with the National Weather Service.

The deluge prompted the National Weather Service to extend a Flash Flood Warning until 10:15 a.m. for northeastern Fort Bend , eastern Waller and western Harris counties.

The original warning expired at 7:30 a.m.

The rainfall abated Tuesday morning, allowing some - but not all - flooding to recede, according to the National Weather Service. Dangerously high water will remain throughout the morning in the areas covered by the warning.

More showers and thunderstorms are expected to hit the Houston area after 12 p.m., Roeseler said.

The National Weather Service issued a flash flood watch for Harris, Montgomery, Liberty, Chambers, Waller and Fort Bend counties through 8 a.m. Wednesday, in anticipation of more rainfall Tuesday afternoon and evening, Roeseler said.

The rain expected Tuesday afternoon and evening likely won't match the downpour from overnight, Roeseler said. Yet, flash flooding is likely because of the already saturated soils from this morning's rainfall.

Current forecasts predict that the areas most likely to be affected by the second round of showers and storms will be further east than those impacted Monday night and early Tuesday morning. Heavy rain is most likely to hit eastern Harris County, Liberty, Chambers and eastern Montgomery counties, Roeseler said.

Houston Community College announced it would delay opening until 10 a.m today due to severe weather.

Classes at the University of Houston Downtown will continue as usual, but two major roadways surrounding the campus, Travis and Girard, are closed due to flooding.

Also near the University of Houston Downtown, the entrance ramp to Interstate 10 westbound from Louisiana was shut down due to high water.

Nearly 4,600 Houston-area households were without power by 6:45 a.m., according to CenterPoint Energy. Many of the customers that lost power were in downtown or Fort Bend County.

The Houston Fire Department has reported about two dozen water rescues on Tuesday, many of which were in west Houston, along the Westpark Tollway and I-10.

(Complete list of high-water road locations below...)

Houston TranStar reports the following roads with high water: