The San Antonio Fire Department told CBS News on Saturday that 13 people have been found dead after flooding on highways in Texas.

Heavy rains in San Antonio rapidly flooded roads, swept away submerged cars and sent some people scrambling up trees to escape fast-rising waters Thursday while firefighters made dozens of rescues across the nation’s seventh-largest city.

Many of the victims were in their cars when a wall of water descended on the area around Northeast Loop 410 and Perrin Beitel Road early Thursday morning