Austin, San Antonio Under Flash Flood Warnings Until 2 p.m. Saturday

Flash flood alerts issued by the National Weather Service were in effect Saturday across South and Central Texas after intense flooding in the Hill Country left dozens dead or missing on Friday.

A flash flood warning was in effect for Austin and central Travis County until 2 p.m. Doppler weather radar around 10:20 a.m. spotted thunderstorms over an area where rain gauges indicated that an inch to 3 inches of rain had already fallen. Another inch to 2 inches of rain were possible in the warning area.

Dangerous and potentially life-threatening flash flooding was expected along urban creeks and streams, urban areas with poor drainage, highways, low-lying streets and underpasses.

Communities in the warning area include Austin, Round Rock, Cedar Park, Pflugerville, Anderson Mill, Tanglewood Forest, Austin-Bergstrom International Airport, Windemere, Leander, Lakeway, Lago Vista, Bee Cave, West Lake Hills, Hudson Bend, The Hills, Rollingwood, Barton Creek, Mansfield Dam, Shady Hollow and Onion Creek.

"In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain," the weather service warned. "Do not attempt to cross flooded roads. Find an alternate route."

A separate flash flood warning was in effect for northeastern Bexar County and south-central Comal County until 2 p.m. Around 10:30 a.m., Doppler weather radar indicated that thunderstorms soaking areas that had already gotten up to 2 inches of rain already. Up to 2 inches of more rainfall were possible, the weather service said.

Communities affected by this warning included San Antonio, New Braunfels, Schertz, Cibolo, Converse, Universal City, Live Oak, Selma, Randolph AFB, San Antonio International Airport, Canyon Lake, Kirby, Windcrest, Bulverde, Garden Ridge, Hollywood Park, St. Hedwig, Smithson Valley, Timberwood Park and Zuehl.

Meanwhile, a flash flood warning was extended for southwestern Caldwell County, northwestern Gonzales County and eastern Guadalupe County until 1 p.m. Saturday, the weather service said.

Doppler weather radar and rain gauges around 10 a.m. showed that areas where between 3 and 6 inches of rain had already fallen were seeing more storms that were expected to dump another inch to 2 inches.

Communities in the flash flood warning area include Seguin, Luling, Kingsbury, Staples, Fentress, Palmeto State Park, Geronimo, Belmont, Stairtown, Ottine, Joliet and McNeil.