Flood advisory for Northern California until 3 a.m. Thursday caused by prolonged downpours

San Francisco and San Mateo counties are included in an updated flood advisory issued by the National Weather Service on Thursday at 1:03 a.m. The advisory is in effect until 4 a.m.

The NWS San Francisco CA said, “Flooding caused by excessive rainfall is expected.”

“Minor flooding in low-lying and poor drainage areas. Water over roadways,” the NWS said. “Turn around, don’t drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night...