Fire crews rescued a woman after she lost control of her car and plunged into a canal near 7th Avenue and Dunlap early Wednesday morning.
Another driver, Brian Rexroad, says he saw the woman driving erratically and followed her.
He saw her stop at a parking lot and when she sat there for a while, he left. But he says he came back a short time later because he was worried about her.
When he did, he saw her drive into the canal.
"I could see the headlights, they were in the water," said Rexroad.
He immediately called 911.
The woman was able to get out and wait on top the vehicle for help.
Crews quickly got her back on dry ground, but car was almost completely submerged in water.
"If she had been pinned or if children had been seatbelted in the car or something, it could have been a fatality very easily," said Phoenix Fire Capt. Tony Mure.
Authorities say the woman was intoxicated and she was booked with DUI.
The woman's name hasn't been released.
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