Remnants of Tropical Storm Rachel lead to heavy rain, flooding in California: news

12-10-2026

Remnants of Tropical Storm Rachel Trigger Heavy Rain and Coastal Flooding Across California

The post-tropical remnants of Tropical Storm Rachel have swept into California, triggering heavy precipitation, flash flood advisories, and dangerous coastal flooding across multiple regions. After tracking northward along the Baja California peninsula, the moisture-laden system collided with local atmospheric conditions, generating localized downpours and high surf that have placed public safety officials on high alert.

Beinsure

Heavy Rainfall Totals and Flash Flood Advisories

Tropical moisture associated with Rachel’s remnants has brought widespread rain across Southern California, impacting Los Angeles, Orange County, the Inland Empire, and San Diego County.

  • Desert and Mountain Areas: Terrain in the San Gabriel, San Bernardino, and Riverside County ranges has recorded up to 1 to 2 inches of precipitation, increasing the threat of sudden runoff and mudslides in sensitive burn-scar areas.

    CBS News

  • Urban Basins: Street flooding and clogged storm drains have caused widespread travel disruptions, with the National Weather Service issuing flash flood watches across several low-lying desert and valley communities.

    Beinsure

Coastal Inundation and Damaging High Surf

Alongside intense precipitation, the storm system has amplified coastal hazards. Unusually high tides combined with heavy swell have produced significant ocean overwash:

  • Boardwalk and Property Inundation: Coastal communities from Newport Beach to Long Beach experienced severe sea-water intrusion, prompting localized emergency declarations and evacuation warnings for low-lying beachfront parcels.

    Beinsure

  • Hazardous Marine Conditions: Gusty coastal winds and rip currents have forced beach closures, with emergency services urging residents to stay off piers, jetties, and vulnerable seawalls.

    SFGATE

Safety Guidelines and Travel Precautions

Emergency management agencies across California advise drivers to exercise extreme caution on rain-slicked roadways. Motorists are urged to obey posted barricades, avoid driving through flooded intersections, and monitor updates from local disaster response units as the storm’s moisture system gradually weakens and shifts eastward.



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