Investigators say she was driving along the I-45 feeder road just before 4:30pm when for some reason, she veered off the road, jumped the curb, hit construction pipes and rolled about 100 feet into the water.
Five witnesses tried to jump into the water to get to her, but they couldn't because the windows on her vehicle were rolled up.
Authorities say they still don't know what caused her to lose control of her vehicle.