AUSTIN, Texas — Flooding across Uvalde County and parts of South Texas prompted road closures and swiftwater rescues as more storms were expected to move into the area.

In downtown Uvalde, multiple roads were closed because of flooding and high water. Drive Texas maps showed numerous closures in the area, and officials warned drivers not to go around barricades.

The National Weather Service issued multiple tornado and severe thunderstorm warnings for counties between San Antonio and Uvalde. A tornado warning that included Yancey was in effect through 7:15 a.m. A severe thunderstorm warning for Yancey, located between San Antonio and Uvalde, was issued until 6:45 a.m., with wind gusts up to 70 mph. The National Weather Service also issued a tornado warning for Frio County and Medina County until 6:30 a.m.

Texas Game Wardens said Tuesday they were responding to multiple swiftwater rescue calls in South Texas counties.

Texas Department of Public Safety officials said tactical marine units were rescuing stranded motorists in floodwaters and reminded people not to walk or drive through flooded roads.

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Video posted by Texas agencies from Uvalde County showed a vehicle whose occupants were rescued shortly before it was swept away. DPS video also showed troopers using boats to move through flooded roads, with law enforcement and rescuers working in knee-high water. Another video showed a truck partially submerged after getting stuck in floodwaters Tuesday, with water nearly up to the truck’s windows.

In San Antonio near Lackland Air Force Base, roads were wet, and Drive Texas reported flooding on a frontage road. Officials continued urging people to avoid flooded roads.