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Read more Breaking: New wildfire reported in Los Angeles County on Sep. 13
Updated: 6:58 a.m. Sep. 13
First discovered: 4 days ago, 9:59 a.m. Sep. 9
Initial location: 9400 block of Steele Canyon Road, Napa County, Calif.
Fire unit: Cal Fire Sonoma-Lake-Napa Unit
Fire type: Wildfire
Fire name: Steele Fire
Steele Fire initially started at 9:59 a.m. Sep. 9 in Napa County, California.
By Sunday morning, it had scorched 51 acres. As of Sunday morning, the fire crew succeeded in containing 91% of the wildfire. At present, there are no details on the cause of the fire.
Fire containment
What does 91% containment mean?
The percentage indicates how much of the fire perimeter has been surrounded by a control line. In this case, it means that 91% of the wildfire is halted from spreading, while 9% 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.
Read more Update: Containment progress – Lucas Fire at 20%
Source: Cal Fire
United Robots Sacramento
This story was originally published September 13, 2026 at 10:22 AM.