Rain has subsided throughout most of the Houston area with more heavy rainfall in the forecast later tonight, according to the National Weather Service.

Multiple crashes and high water locations were reported overnight into the morning, as well as several school district closures. Some roads were still under water as of 8 a.m., according to meteorologists and the Texas Department of Transportation.

Rising bayous and creeks exacerbated much of the overnight flooding, but some waterways have slightly receded since then.

Harris County saw widespread rainfall between 1 and 7 inches overnight, according to the Harris County Flood Warning System. More heavy rainfall is expected to hit the area on Saturday and subside on Sunday.

MORE STORM COVERAGE: Storms prompt school, event cancellations around Houston

"Additional rainfall [Friday] is not expected to cause flooding but may keep flood waters from receding as quickly," the weather service said on Friday morning, adding that a flash flood watch with remain in effect until Saturday.

Overnight, golf-ball sized hail was reported in Katy, along with multiple stranded cars in flooded areas throughout Houston. Lightning caused a fire at a large three-story home in Friendswood at FM528 and Payson Place, according to Metro Video.

The Houston TranStar map identified 22 high water locations to avoid, including: Interstate 45 northbound at Interstate 10 East; Interstate 45 northbound at Memorial; Interstate 45 northbound and southbound at Texas 249; North Loop eastbound near Gellhorn; North Loop eastbound and westbound at Gellhorn; Hardy Toll Road southbound at Crosstimbers.

Near Rosenberg, U.S. 59 southbound exit ramps to FM762 and Islieb are closed, according to TxDOT. A tanker truck spill closed the southbound West Loop exit ramp to U.S. 59 north and south, TxDOT said.

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More high water locations have been reported near Tomball, Richmond and Fresno. TranStar also identified several areas with high flood risks, including Hunting Bayou at the East Freeway and Armand Bayou at Genoa-Red Bluff Road.

Spring Creek at the North Freeway in Montgomery County is expected to stay within its banks through the weekend, according to Pct. 3 Commissioner James Noack. Richmond police said the Brazos River is expected to crest today at 1 p.m. and should remain at a minor flood level through next Wednesday.

Right now, about 43,000 people are dealing with power outages, according to CenterPoint.

This story will be updated.

Julian Gill is a digital reporter in Houston. Read him on our breaking news site, Chron.com, and on our subscriber site, houstonchronicle.com. | julian.gill@chron.com | NEWS WHEN YOU NEED IT: Text CHRON to 77453 to receive breaking news alerts by text message | Sign up for breaking news alerts delivered to your email here.