Southern California is bracing for potentially severe weather this week, as a strong atmospheric river is expected to bring heavy rainfall to the region. The National Weather Service has forecasted that rain will begin on Wednesday morning, with the most significant downpours anticipated early Thursday and continuing through Thursday night into Friday morning.
Forecasters predict that coastal and valley areas could receive between 2 to 4 inches of rain, while the mountains and foothills may see totals of 4 to 8 inches or more. The chances of experiencing such heavy rainfall are estimated at 60% for Santa Barbara and San Luis Obispo counties, and 40% for Los Angeles and Ventura counties. This marks an increase from earlier forecasts, which had placed the likelihood of heavy rain in L.A. and Ventura counties at 30%.
While the rain could provide much-needed relief after a particularly harsh winter fire season, it also raises concerns about the risk of landslides and debris flows, which are common in California’s mountainous regions. Landslides can occur when intense rainfall saturates the soil, particularly in areas that have been recently burned by wildfires. The loss of vegetation from wildfires leaves hillsides vulnerable to erosion, making them susceptible to rapid runoff that can carry mud, rocks, and debris downhill.
The risk of debris flows is heightened in areas where rainfall rates exceed half an inch per hour. Meteorologists warn that if the rain falls at this intensity, it could trigger dangerous flows that pose a threat to homes and infrastructure in affected areas.
Historically, California has experienced devastating landslides following wildfires. For instance, in January 2018, a debris flow in Montecito, which had recently suffered from the Thomas fire, resulted in the deaths of 23 people and significant property damage.
Residents in affected areas are urged to remain vigilant and prepare for the possibility of evacuation if conditions worsen. As the storm approaches, emergency services are on standby to respond to any incidents that may arise due to the severe weather.
With the storm expected to make landfall soon, Southern Californians are reminded to stay informed and heed any warnings issued by local authorities.