Heavy downpours are still drenching South Texas with the possibility of dangerous flash flooding. The storms also spawned a tornado in San Antonio on Wednesday morning.

A rare and dangerous flash flood event is unfolding, with up to a foot of extra rain possible.

Intense rain rates and compounding effects from multiple rounds of storms will result in a dangerous flash flooding threat through Thursday,” the National Weather Service said.

Heavy downpours drenching South Texas, causing floods and forcing evacuations. More than six million people in 57 counties were under a National Service flood watch, and in some areas flash flood warnings are in effect.

Texas Gov. Greg Abbott issued a disaster declaration Tuesday for 59 counties as severe storms and flash flooding continue to threaten the state. He directed the Texas Division of Emergency Management to keep the State Emergency Operations Center running around the clock at an escalated response level.

With heavy rains in the forecast this week, Texas Gov. Abbott has activated several state resources to help aid communities. Here's what to know.

Girl Scouts of Southwest Texas evacuated Camp La Jita Tuesday due to area flooding, according to a release.

The bull's-eye for the heaviest rainfall has been west of I-35, where some communities have received more than a foot of rainfall since Monday.