The death toll from heavy rains that inundated parts of San Antonio has risen to 13, and all those missing have been found, authorities said Saturday. More than 7 inches (18 centimeters) of rain fell over a span of hours on Thursday,

The San Antonio River Authority maps and models floodplains, oversees flood infrastructure. They are gathering information on the areas and creeks that flooded Thursday so they can assess if changes need to be made.

"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."

This week in South Texas is expected to be much drier as a ridge of high atmospheric pressure moves into West Texas for a day or two.