The storm blew in fast and with a fury, bringing with it heavy rain, lightning and strong winds.
By early Wednesday morning, roads around the city began to flood.
The corner of San Pedro and Quincy looked more like the San Antonio River.
The lower level of Interstate 35 just north of downtown became impassable, the water rising so fast, it caught motorists by surprise.
One driver became trapped inside his vehicle when the water came up to his window. A Good Samaritan tried to help before police and rescuers arrived. (luis nakamoto, rescuer) 3:17:33
"I felt like he was in danger and i wanted to go help him out," said Luis Nakamoto.
On the northeast side, another rescue team sprang into action after a woman drove into high water on Holbrook at the rain-swollen Salado Creek.
The driver was brought safely to drier ground.
But it was just another of the many high-water rescues emergency responders were called to.
"Tonight, i've gone to about five or six of them. I know our rescue team has two boat teams that have been busy all night," said San Antonio Fire Department batallion chief, Richard Giusti.
Unlike in past floods, no one was injured Wednesday. No lives were lost.
But it was an overdue reminder of how quickly area roads can flood when the rains come hard and fast.
