San Antonio’s history is marked by frequent flooding, but a handful of rain events have truly rewritten the history books.

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

The death toll from heavy rains that inundated parts of San Antonio has risen to 13, and all those missing have been found

"Developing in one part of the city can change the flood risk in another part of the city because of these drainage networks. All parts of cities are interconnected," explained Dr. Ali Mostafavi, a professor of Civil Engineering, Texas A&M University. "The drainage capacity is always behind the development."

The flash floods that swept San Antonio early Thursday killed thirteen people, and all but one of the victims has been identified.