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Read more Update: Verona Fire in Riverside County nears full containment at 95%
Updated: 8:49 a.m. May 24
First discovered: 16 hours ago, 4:22 p.m. May 23
Initial location: Twist Road and Jacksonville Road, Tuolumne County, Calif.
Fire unit: Cal Fire Tuolumne-Calaveras Unit
Fire type: Wildfire
Fire name: Twist Fire
Twist Fire initially started 4:22 p.m. May 23 at Twist Road and Jacksonville Road in Tuolumne County, California.
Since its discovery 16 hours ago, it has burned 24.2 acres. By Sunday morning, a crew of 58 firefighters effectively contained 50% of the fire. The blaze’s cause remains under investigation.
Firefighting efforts include five engines, three water tenders and two hand crews. According to Cal Fire, “Numerous firefighting air tankers from throughout the State are flying fire suppression missions as conditions allow.”
Read more Breaking: Mid Fire reported in Kern County on May 22
Fire containment
This is what 50% containment means
The percentage indicates how much of the fire perimeter has been surrounded by a control line. In this case, it means that 50% of the wildfire is halted from spreading, while 50% 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 Update: Nearly full contained Bain Fire in Riverside County, now at 95%
Source: Cal Fire
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This story was originally published May 24, 2026 at 9:29 AM.