Record-breaking King Tides struck the San Francisco Bay Area and parts of the Northern California coast on Friday and Saturday, January 2-3, 2026, causing widespread coastal flooding across multiple counties. Tide gauges across the region recorded water levels up to 0.76 m (2.5 feet) above normal, breaking multiple records and prompting road closures, flood warnings, and emergency advisories.
A major atmospheric river swept across Southern California from late December 24, 2025, into Christmas Day, December 25, triggering widespread flash floods, evacuations, debris flows, and power outages. Multiple counties including Los Angeles and Ventura were put under a State of Emergency. Rainfall totals reached 75–150 mm (3–6 inches) in coastal and valley areas, with up to 250 mm (10 inches) in higher terrain of Los Angeles and Ventura counties, prompting officials to urge residents to avoid travel.
One person was killed and several were rescued after torrential rain from an atmospheric river caused severe flooding in Redding, northern California, on December 21–22, 2025. Rainfall totals above 100 mm (4 inches) overwhelmed storm drains, flooded roads.
Flooding triggered by the remnants of Tropical Storm Mario caused the death of a 2-year-old in the city of Barstow, California, after he got swept away by the floodwaters on September 18, 2025. The fatality was confirmed by the police on September 19, after the body of the deceased was found in a flood control channel in the area.
Remnants of Tropical Storm Mario brought widespread rainfall to California and the Desert Southwest on September 17–18, 2025, prompting water rescues, triggering mudslides, and flash flooding across the region.
More than a dozen roads in Imperial County, California were shut down on August 26, 2025, after severe monsoonal storms triggered flash floods, road erosion, and power outages across the region.
Southern California is under a dangerous flood threat with heavy rainfall impacting Los Angeles and San Diego areas, and moving eastward. Flood Watch is in effect for more than 20 million people from Southern California to central Arizona.
Just three days after a powerful atmospheric river (AR) event brought heavy rain to parts of California, leaving at least 2 people dead and nearly 10 000 under evacuation orders, another AR will reach the region late Monday, March 13, 2023, bringing more risk of flash flooding and heavy mountain snow through Wednesday.
A powerful atmospheric river brought heavy rains to northern and central California on December 31, 2022, bringing widespread flooding and power outages. At least 2 people lost their lives.
Major flash flooding hit Death Valley National Park on August 5, 2022, closing all roads, burying cars and stranding around 1 000 people.
