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Read more Update: Nash Fire in San Bernardino County remains at 50% containment by Sunday evening
Updated: 8:54 p.m. July 5
First discovered: 46 hours ago, 9:56 p.m. July 3
Initial location: Franklin Canyon Road, Martinez, Contra Costa County, Calif.
Fire unit: Cal Fire Santa Clara Unit
Fire type: Wildfire
Fire name: Franklin Fire
Franklin Fire initially started 9:56 p.m. July 3 on Franklin Canyon Road, Martinez in Contra Costa County, California.
Since its discovery 46 hours ago, it has burned 10.6 acres. As of Sunday evening, 90% of the fire was brought under containment. The cause of it is still under investigation.
Fire containment
What does it mean for a fire to be 90% contained?
Containment indicates what percentage of the fire perimeter has been surrounded by a control line. In this case, it means that 90% of the wildfire is contained from spreading, while 10% is still uncontrolled.
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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.
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Source: Cal Fire
United Robots Sacramento
This story was originally published July 5, 2026 at 6:50 AM.