A fast-moving wildfire has forced evacuation orders for approximately 29,000 people in and around Simi Valley, a residential city of more than 125,000 residents in Ventura County, roughly 30 miles (48 kilometres) northwest of Los Angeles. The so-called Sandy Fire ignited on Monday morning, driven by winds gusting up to 55 km/h (34 mph), and rapidly spread through dry hillside brush, generating thick columns of smoke visible from space via NASA satellite imagery. By Tuesday morning, the blaze had consumed more than two square miles (five square kilometres) of land and destroyed at least one home, with zero containment reported.
California Governor Gavin Newsom confirmed that more than 10,000 homes had been evacuated, with a further 3,500 under evacuation warnings extending into neighbouring Los Angeles County. The Simi Valley Police Department said a preliminary report suggested the fire may have been sparked when an individual "hit a rock with a tractor," though the cause remains officially under investigation. Around 750 firefighters, supported by night-flying water-dropping helicopters and fixed-wing aircraft, worked through the night to target hotspots. Ventura County Fire Department spokesperson Andrew Dowd noted that calmer overnight winds had allowed crews to make significant progress, though conditions were expected to worsen again as winds picked up.
Los Angeles mayor Karen Bass said officials did not anticipate the blaze spreading into the city itself, but cautioned that evacuation warnings in parts of northern Los Angeles County had been issued "out of an abundance of caution." Schools across the Simi Valley Unified School District cancelled classes on Tuesday. NASA's Fire Information for Resource Management System showed active hotspots continuing to move south overnight.
A second wildfire is burning simultaneously on Santa Rosa Island, one of five Channel Islands situated off the southern California coast. That blaze has scorched approximately 14,600 acres (6,000 hectares) of the Channel Islands National Park, destroying a cabin and equipment shed and forcing the evacuation of 11 National Park Service employees. At least 70 firefighters and park rangers have been deployed there, and the US Coast Guard rescued a 67-year-old man from the island's shore.
The fires arrive in a region still recovering from the devastating January 2025 blazes in the wider Los Angeles area, which killed around 30 people and destroyed more than 10,000 homes. Experts point to a warm winter followed by a record-breaking March heatwave as key factors drying out vegetation across southern California, creating conditions that allow fires to ignite and spread with alarming speed.