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Read more Update: Twist Fire in Tuolumne County still at 50% containment by Sunday morning
Updated: 9:12 a.m. May 24
First discovered: 6 days ago, 10:50 a.m. May 18
Initial location: Off Sandy Ave, Simi Valley, Ventura County, Calif.
Fire unit: Ventura County Fire Department
Fire type: Wildfire
Fire name: Sandy Fire
Sandy Fire initially started 10:50 a.m. May 18 on Off Sandy Ave, Simi Valley in Ventura County, California.
It has burned 2,183 acres after being active for six days. A crew of 415 firefighters effectively contained 71% of the fire as of Sunday morning. However, the cause is still being investigated.
The fire is fought by 15 engines, one water tender, six dozers and three hand crews. According to Cal Fire, “Numerous firefighting air tankers from throughout the State are flying fire suppression missions as conditions allow.”
Read more Update: Verona Fire in Riverside County nears full containment at 95%
See live video from the area:
Https://cameras.alertcalifornia.org/?id=Axis-OatSouth2
Fire containment
What does it mean for a fire to be 71% contained?
Containment indicates what percentage of the fire perimeter has been surrounded by a control line. In this case, it means that 71% of the wildfire is contained from spreading, while 29% is still uncontrolled.
Containment is part of a larger plan for managing a wildfire. It is normally expressed as a percentage and it refers to how much of the fire perimeter has been surrounded/enclosed by a control line that firefighters create. The containment percentage indicates a certain level of control, but it doesn’t always correlate to safety level. Also, it’s important to note that containment doesn’t mean a fire is out.
How is containment measured?
The incident’s central command constantly receives progress reports from firefighters on the ground. As the fireline is constructed, inspected or reinforced, mappers record those details to adjust the containment percentage. The percentage tells the public how much of the fire perimeter is believed to not go beyond the control lines.
Read more Breaking: Mid Fire reported in Kern County on May 22
Source: Cal Fire
United Robots Sacramento
This story was originally published May 24, 2026 at 9:29 AM.