A brush fire reported Monday morning, May 18, 2026, near Sandy Avenue in Simi Valley spread across dry hillside terrain, prompting evacuation orders, school closures and a large emergency response near the Ventura and Los Angeles county line.
The blaze, identified by fire officials as the Sandy Fire, was first reported Monday morning off Sandy Avenue. Fire crews moved quickly into the area as flames climbed through brush close to neighborhoods in southern Simi Valley. By Monday night, state fire officials reported that the fire had burned more than 1,300 acres with no listed containment.
The fire’s location drew regional attention because of its proximity to residential areas, schools, key roads and communities near western Los Angeles County. Smoke from the hillsides spread across parts of Ventura County and the San Fernando Valley, prompting air quality concerns for residents downwind of the fire.
Crews used ground engines, hand crews, helicopters and aircraft to slow the fire’s spread. Video and local reports showed water drops over rugged terrain as smoke rose above the hills. Firefighters also worked near homes where the fire threatened structures along the edge of open land.
Officials said the cause had not been determined as of the latest public updates. Fire agencies continued to focus on life safety, evacuation routes and containment work as weather remained a concern.
Evacuation Orders Expand as Residents Face Fast Changing Conditions
Evacuation orders were issued for multiple Simi Valley zones as the fire advanced through brush and threatened nearby neighborhoods. Officials told residents in ordered areas to leave immediately, while other communities were placed under evacuation warnings.
The warnings extended toward parts of Los Angeles County, including areas near Agoura Hills, Calabasas, Hidden Hills, Chatsworth, West Hills and Lake Manor. The warning zones did not mean every neighborhood was under direct threat, but they reflected the fire’s movement and the need for residents to prepare in case conditions changed.
Emergency officials urged residents to follow official alerts and avoid relying on secondhand updates. The fire moved through terrain where wind, slope and dry vegetation can shift conditions within minutes.
Temporary evacuation sites were opened for residents and animals. Rancho Santa Susana Community Park was listed as a temporary evacuation point. Simi Valley High School was used as an evacuation location for affected students. Animal care locations were also made available for small and large animals, including the Simi Valley Animal Shelter and the Ventura County Fairgrounds.
Road closures were reported around fire activity and evacuation zones. Closures affected parts of Bell Canyon Road, Katherine Road, Oak Knolls, Crinklaw Lane and Santa Susana Pass Road. Officials said the closures were needed to keep evacuation routes open and allow fire crews to move equipment safely.
Residents outside the evacuation zones were advised to stay alert, keep vehicles fueled, gather essential items and prepare to leave if alerts changed. Fire officials also reminded the public not to enter closed areas, where traffic can slow emergency response.
Schools Close as Smoke and Evacuations Disrupt Daily Life
The fire quickly affected schools across Simi Valley. The Simi Valley Unified School District announced campus closures for Tuesday after several schools were located within evacuation zones or near impacted areas.
Earlier Monday, students from Crestview Elementary and Mountain View Elementary were moved by bus to Simi Valley High School. Other campuses kept students indoors because of smoke and air quality concerns. Outdoor activities were suspended while the district monitored conditions.
District officials said the closures were made out of caution as fire crews worked nearby and evacuation notices continued to shift. Families were advised to follow district updates rather than report to campuses unless instructed.
The fire also disrupted commuting routes, local businesses and neighborhood routines. Smoke was visible from several parts of Simi Valley and nearby communities. For residents with breathing concerns, officials recommended staying indoors, keeping windows closed and limiting outdoor activity when smoke was present.
The Ronald Reagan Presidential Library and Museum in Simi Valley also closed as a precaution. Public reports said the site was several miles from the active fire area and was not under evacuation orders at the time of those updates.
Emergency crews continued working near residential edges where homes sit close to open hillside terrain. At least one home and another structure were reported damaged in local coverage, though officials had not released a broad damage assessment in the early public updates.
The fire placed renewed attention on the overlap between hillside neighborhoods, dry brush and strong winds across Southern California. In Simi Valley, that combination shaped the response from the first hours of the fire.
Winds and Dry Brush Challenge Firefighters Across Rugged Terrain
The Sandy Fire grew during a period of gusty winds and dry conditions. Weather reports showed Santa Ana winds moving through the area Monday, with gusts strong enough to push flames through brush and send smoke across a wide region.
Fire crews faced steep terrain and shifting winds as they worked to slow the fire’s movement. In hillside fires, flames can move quickly uphill, while wind can push embers ahead of the main burn area. Those conditions can make containment work difficult during the first operational period.
Helicopters and aircraft were used to drop water and retardant where conditions allowed. Ground crews worked near homes, roads and ridgelines to protect structures and create fire breaks. Fire officials also called in support from other agencies as the response expanded.
By late Monday, more than 750 firefighters were reportedly assigned to the fire. Crews from local, county and state agencies joined the effort, with additional resources staged in nearby areas in case the fire moved toward new neighborhoods.
Air quality agencies issued smoke advisories for parts of Los Angeles and Ventura counties. Smoke levels can vary by neighborhood, depending on wind direction and fire behavior. Residents were encouraged to check official air quality updates and reduce exposure when smoke was visible or smelled outdoors.
Warm and dry conditions were expected to continue into Tuesday, keeping the fire response active. Even when winds ease, dry brush and hot spots can continue to challenge crews. Firefighters remained focused on protecting neighborhoods, holding containment lines and preventing flare ups near structures.
