Orange County and Los Angeles are due for a large storm beginning Jan. 4 through Jan. 6, which may bring mudslides and flooding in some areas, according to the Orange County Fire Authority.
A strong Pacific storm system is the cause of the heavy rainfall affecting the coastal and inland areas as far as the San Bernardino and Santa Ana mountains.
The National Weather Service reported most areas in Orange County will receive half an inch of rain Tuesday, increasing to six inches by Friday.
A flood watch and wind advisory will be in effect in Orange County starting Wednesday night and lasting through Thursday night, according to the National Weather Service.
Higher elevations are expected to receive some snow as well.
According to Orange County Fire Authority officials, it is monitoring the weather closely to determine areas at risk of mudslides or flooding.
According to fire authority spokesman Cpt. Paul Holaday, the agency is prepared to staff needed resources at such locations if necessary.
Canyons and areas that have experienced fires including Silverado, Santiago, and Majeska canyons have the potential for flooding and landslides.
Resources that may be deployed include water rescue teams, bulldozers, helicopters, and firefighters.
Authorities are urging the public in vulnerable areas to fortify their homes and to keep personal effects nearby in case an evacuation order is issued.
The most common incidents during a heavy rainstorm, according to the fire authority, are traffic accidents, flooding roads, and overflowing flood channels.
Health officials are also warning against any contact with stormwater runoff, which can carry bacteria, chemicals, and trash, which can make people ill.
Temperatures are also expected to be cool throughout the week in the region, with highs in the 50s and 60s in most areas.
