Storms hitting Southern California raise the risk of flooding, debris flows and dangerous surf, forecasters warn.

The biggest worry is debris flows near burn scars, where soil cannot absorb sudden downpours.

Residents in and below burn areas are told to have evacuation plans ready.

Heavy rain can overwhelm drains and freeways, turning underpasses into lakes.

Large swells can bring rip currents and sneaker waves, so beachgoers should stay back from the water.

The same pattern is bringing Sierra snow and tornado risk in parts of Northern California.

Officials urge clearing gutters, charging phones, avoiding travel and never driving through flooded roads.

Read the full article for more details on the Southern California storms.