On the northbound 405 Freeway in Long Beach, a driver coming home from the Chargers football game said he collided with a Chevy Blazer that spun out.
"By the time I hit him, his headlights were facing mine, and we went head-on," said driver Mark Patterson.
Police urge drivers to slow down and be careful on the wet roads.
Also, a tree reportedly fell on a man on Buena Ventura Street in Woodland Hills Monday afternoon. His condition is unknown.
The rain is also creating serious traffic troubles.
Earlier Monday, two separate, serious accidents on Southern California freeways required authorities to cut out the drivers from their vehicles.
One occurred on the 57 Freeway in Anaheim while the other happened on the 405 Freeway in Seal Beach. Neither driver was seriously injured.
Traffic was delayed for hours in the Griffith Park area after an armored car overturned on the rain slicked northbound 5 Freeway near eastbound 134 Freeway shortly before 4 a.m. Monday.
Authorities shut down three lanes, and two people were injured and were transported to hospitals.
Their conditions are not known and the cause of the crash is being investigated.
The Highway Patrol says that in Los Angeles County, 81 traffic incidents were reported between 5 a.m. and 9 a.m. Monday. That's with traffic being lighter than usual because of the Dr. Martin Luther King Jr. holiday.
Last week, when L.A. County was not in the grips of a winter storm, that figure was 64 incidents during the same time period.
CNS contributed to this report.