Over 22 million residents in Southern California are under a flood watch as a significant storm approaches, threatening burn scar areas with mudslides, debris flows, and heavy rainfall. Evacuation warnings are currently in effect for several burn scar regions, including Canyon, Bethany, Eaton, Palisades, Hurst, Kenneth, Sunset, Lidia, Franklin, and Bridge. Los Angeles County officials have advised, "Anyone in these areas should be ready to leave at a moment's notice."

The storm is expected to bring light to moderate rain throughout Friday, but the most severe flooding risks will begin Friday night and continue into Saturday. Heavy rainfall, along with potential lightning and strong wind gusts, is anticipated. Evacuation orders will be implemented late Friday for the same burn scar areas.

Los Angeles Public Works has warned that some streets may be "entirely blocked by debris," and certain structures could be at risk depending on their location. Rainfall rates could reach 1 inch per hour, with total precipitation between Friday and Saturday estimated at 4 to 6 inches. Areas experiencing the heaviest storms or located at higher elevations may receive 6 inches or more.

A moderate risk of excessive rainfall and flash flooding is in place for Los Angeles and Santa Barbara, particularly during the heaviest rain expected Friday night, Saturday morning, and early Saturday afternoon. The most intense rainfall is forecasted from 8 p.m. local time Friday until 3 p.m. Saturday.

Additional rain is possible throughout the following week, maintaining the threat of mudslides and debris flows due to already saturated ground conditions. California Governor Gavin Newsom announced on Thursday that emergency resources will be pre-deployed to safeguard communities in Los Angeles, Orange, and Ventura counties from potential mudslides and debris flows.

Typically, Los Angeles sees an average of 0.8 inches of rain for the entire month of November, with a historical record of 9.68 inches set in 1965. This storm could deliver more rainfall than the average November total in just one day for affected areas.