Southern California Faces Rare High Risk of Flooding and Mudslides

Rare High Risk of Flooding

• ⚠️ The National Oceanic and Atmospheric Administration (NOAA) has issued a rare high risk for extensive flooding in California due to a powerful storm.
• 🌧️ Nearly half of California, impacting over 19 million residents, is under a moderate or high risk of flooding on Christmas Eve.
• 🌊 This storm is the same atmospheric river that previously impacted Northern California.

Flash Flooding and Mudslides

• 🚨 Evacuation orders are in effect for over 120 homes in Altadena and Pacific Palisades due to concerns about flash flooding and mudslides.
• 🏞️ Areas burned by recent wildfires are particularly vulnerable, as the soil cannot absorb heavy rainfall, leading to runoff and potential debris flow.
• 🏠 Residents are being urged to leave, with some experiencing severe mudflow situations in the past, even after implementing barriers and sandbags.

Forecast and Travel Impacts

• 🌨️ The West Coast is experiencing widespread weather alerts, including high wind warnings with gusts up to 90 mph and 5-8 feet of snow in the Sierra Nevada.
• 🚗 Treacherous travel conditions are expected, with recommendations for extra time and tire chains for those in mountainous regions.
• 💧 Central and Southern California are forecasted to receive 6 to 14 inches of rain in the next 24-36 hours, exacerbating the risk of burn scar flash flooding and mudslides.
• 🌦️ While there may be brief breaks, additional rain waves are anticipated throughout Christmas Day.