By admin 
The creation of this content included the use of AI based on templates created, reviewed and edited by journalists in the newsroom. Read more on our AI policy here.
Read more Update: Rider Fire in Riverside County remains fully contained by Sunday morning
Updated: 6:21 a.m. July 26
First discovered: 16 hours ago, 2:01 p.m. July 25
Initial location: At the top of Vargas Road, Fremont, Alameda County, Calif.
Fire unit: Cal Fire Santa Clara Unit
Fire type: Wildfire
Fire name: Vargas Fire
Vargas Fire initially started 2:01 p.m. July 25 at At the top of Vargas Road, Fremont in Alameda County, California.
As of Sunday morning, it had ravaged 10 acres. The fire crew managed to contain the fire entirely by Sunday morning. At present, there is no information available on the cause of the fire.
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 firefighters have managed to get a line completely around the wildfire’s perimeter 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.
Read more Update: Rock Fire in Inyo County – containment reaches 45%
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.
Read more Piper Sandler: 5 software stocks cutting AI token costs
Source: Cal Fire
United Robots Sacramento
This story was originally published July 26, 2026 at 6:47 AM.