Update: Landon Fire in Merced County containment now reaches 100%
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Updated: 9:55 p.m. May 6
First discovered: 10 hours ago, 11:55 a.m. May 6
Initial location: East Yosemite Ave and East of UC Merced, Merced County, Calif.
Fire unit: Cal Fire Madera-Mariposa-Merced Unit
Fire type: Wildfire
Fire name: Landon Fire
Landon Fire initially started today at 11:55 a.m. at East Yosemite Ave and East of UC Merced in Merced County, California.
It has burned 22.6 acres after being active for 10 hours, an increase of 23 acres since the last update. By Wednesday evening, the blaze has been fully contained. However, investigations into the cause are ongoing.
Fire containment
What does 100% containment mean?
Note that full containment doesn't mean the fire is completely out. In this case, it means that the wildfire has been fully enclosed by a control line and it is now stopped from spreading. A fully contained wildfire may continue to burn within the containment perimeter but is not likely to spread.
However, there's a significant difference between containing and controlling a wildfire. After the fire is fully contained, the next step is to control it. Controlling a fire means ensuring that the fire can't spread or cross the containment line.
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.
Source: Cal Fire
United Robots Sacramento
This story was originally published May 7, 2026 at 9:51 AM.