At 5:47 am Wednesday, the East Contra Costa Fire Protection District responded to a report of an overturned vehicle crash which reportedly ended up in the water.
The incident was originally reported in Discovery Bay, however, upon further investigation, Engine 59 arrived on scene 2-miles east of Old River Bridge and confirmed the vehicle was partially submerged on its roof near Victoria Island Farms in San Joaquin County.
Stockton fire was also dispatched with a scuba rescue team. A medical helicopter was requested and Contra Costa Fire was providing a rescue boat.
10:32 am Update:
According to CHP, a witness told them the driver was passing vehicles and swerved off the road into the canal to avoid oncoming traffic. The end result was a fatality and the vehicle was registered out of Napa. The crash occurred 3-miles east of Old River Bridge.
No other information was released.
6:04 AM 6  LL 1185
5:49 AM 5  [Rotation Request Comment] 1039 CENTRAL TOW 209-836-5705
5:48 AM 4  PER FIRE – START 1185
5:41 AM 3  VEH DROVE OFF RDWY
5:41 AM 2  [Appended, 05:43:39]  VEH OT
5:39 AM 1  [Appended, 05:42:57]  VIA SPANISH TRANS