A man walks past a submerged vehicle on a flooded street- Thursday- Dec - - in Santa Barbara- Calif Jae C Hong : AP

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Daniel Swain for Washington Post — Pacific storm that unleashed coastal flooding pushes across Southern California into Arizona

UCLA climate scientist Daniel Swain discusses recent Pacific storm that pushed eastward through desert areas into Arizona after flooding communities northwest of Los Angeles for the Washington Post. “In Oxnard, particularly, overnight there were downpours that preliminary data suggests were probably the heaviest downpours ever observed in that part of Southern California,” Swain said.