Update: Rosa Fire in Riverside County now brought under 100% containment

Published Aug 24, 2025 #Ponderosa fire

Updated: 6:43 a.m. Aug. 24

First discovered: 21 days ago, 5:35 p.m. Aug. 3

Initial location: Santa Rosa, Riverside County, Calif.

Fire unit: San Bernardino National Forest

Fire type: Wildfire

Fire name: Rosa Fire

Rosa Fire initially started 5:35 p.m. Aug. 3 in Riverside County, California.

It has burned 1,671 acres after being active for 21 days. By Sunday morning, the blaze has been fully contained by a crew of 598 firefighters. Investigations into its cause are still ongoing.

Fuels involved in this wildfire, according to InciWeb: “Heavy Brush, Grass and Oak overstory.”

More reports from InciWeb:

Incident overview:

“Rosa Fire Last Update Final Rosa Fire Map The fire remains within the existing perimeter, no growth is expected. Fire Suppression repair has been completed. Management of the fire has been turned back to the local units (Riverside County Fire, and the San Bernardino National Forest. Closures: Pinyon Campground, Santa Rosa Truck Trail and associated remote”yellow post”Campsites, Cahuilla Tewanet Viewpoint, and the Sawmill and Cactus Springs Trail have reopened for public use. The Upper Palm Canyon Trail will remain closed and a long-term closure order will be issued which will assist the fire area to begin the recovery process. Information for Residents:Sign up for local emergency alerts at: RivCoReady.org/AlertRivCo and download the Genasys Protect appProtect your property: Learn about Defensible Space at https://www.fire.ca.gov/dspace For additional information when returning home after a wildfire, refer to: www.readyforwildfire.org Incident Camera Link: https://cameras.alertcalifornia.org/? Pos=33.7403_-116.4633_9&id=Axis-ToroPeak1 Air Quality: For Up-to-date information on air quality in your area, please visit https://fire.airnow.gov/ For links to information and tips on managing wildfire smoke exposure, please visit: https://californiasmokeinfo.blogspot.com/ Evacuation Orders: All residential evacuation orders arehave been rescinded. Power Pole Replacement continues in the Fire effected area. click https://www.anzaelectric.org/rosa-fire to read a message about ongoing efforts to re-energize the area.”

Please note that this incident overview is an automatically published and unreviewed quote from InciWeb. Therefore it might be incomplete, hard to read or include misspelled words.

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 whole perimeter of the wildfire has been surrounded 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: InciWeb