Flash flood warning in place for San Mateo County until early Thursday morning – urgent action advised

San Francisco and San Mateo counties were placed under an updated flash flood warning by the National Weather Service on Thursday at 2:56 a.m. The warning is in effect until 6 a.m.

“At 2:56 a.m., The public reported heavy rain and flooding across the warned area. Between 0.5 and 1 inch of rain has fallen. Flash flooding is already occurring,” the NWS San Francisco CA said. “Life threatening flash flooding of creeks and streams, urban areas, highways, streets and underpasses.”

Locations...