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Madre Fire slows as containment holds in SLO County. See latest acreage

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Crews continued to make progress on the Madre Fire burning in remote eastern San Luis Obispo County on Monday, with the overall acreage burning barely increasing from the day before.

As of 11 a.m. Monday, the Madre Fire had burned 80,479.5 acres of grassland — an increase of around 231 acres from Sunday afternoon — and was holding at 30% containment by fire and emergency services, according to public safety app Watch Duty.

The fire, which was originally spotted Wednesday afternoon along Highway 166 near New Cuyama, grew exponentially over the holiday weekend, clocking in as the largest wildfire in California so far this year.

On Wednesday alone, the fire quadrupled in size in a matter of hours, reaching 35,000 acres by Wednesday evening.

Flames from the Madre Fire send a towering plume of smoke into the sky in eastern San Luis Obispo County on July 2, 2025.
Flames from the Madre Fire send a towering plume of smoke into the sky in eastern San Luis Obispo County on July 2, 2025. Brittany App

By Friday, more than 70,000 acres were burning, with flames spreading north toward the Carrizo Plain National Monument propelled by strong winds over hilly terrain.

As of Saturday morning, the fire was 10% contained at over 79,000 acres, and plateaued there as the holiday weekend wrapped up.

Monterey County firefighters Jonathan Davis, left, and Ryan Cahalan extinguish smoldering wood posts on a cattle fence along Soda Lake Road after the Madre Fire burned through the area on July 3, 2025.
Monterey County firefighters Jonathan Davis, left, and Ryan Cahalan extinguish smoldering wood posts on a cattle fence along Soda Lake Road after the Madre Fire burned through the area on July 3, 2025. David Middlecamp dmiddlecamp@thetribunenews.com

Multiple zones in the surrounding area were still under evacuation warnings in San Luis Obispo County, though some warnings for Kern County were lifted as of Monday morning.

Evacuations have been ordered in the following zones:

  • LPF-017
  • SLC-226
  • SLC-240
  • SLC-263
  • SLC-264
  • SLC-265
  • SLC-298
  • SLC-299
  • SLC-300
  • SLC-312
  • SLC-313
  • SLC-337
  • SLC-338
  • SLC-339
  • SLC-358
Remains of an oak tree smolder in scorched grassland. The Madre Fire burned on the northern side of Highway 166 and into the mountain areas toward the Carrizo Plain seen here on the second day July 3, 2025.
Remains of an oak tree smolder in scorched grassland. The Madre Fire burned on the northern side of Highway 166 and into the mountain areas toward the Carrizo Plain seen here on the second day July 3, 2025. David Middlecamp dmiddlecamp@thetribunenews.com

Evacuation warnings were also issued for the following zones:

  • SLC-225
  • SLC-239
  • SLC-266
  • SLC-301
  • SLC-359
  • SLC-365
  • SLC-366
  • SLC-367
  • Santa Barbara County-East of the Rock Front area, West of Cotton Wood Canyon Rd, and South of Highway 166.
Monterey County firefighters Jonathan Davis, left, and Ryan Cahalan extinguish smoldering wood posts on a cattle fence along Soda Lake Road after the Madre Fire burned through the area on July 3, 2025.
Monterey County firefighters Jonathan Davis, left, and Ryan Cahalan extinguish smoldering wood posts on a cattle fence along Soda Lake Road after the Madre Fire burned through the area on July 3, 2025. David Middlecamp dmiddlecamp@thetribunenews.com

As of 10:37 a.m. on Monday morning, evacuation warnings were also lifted in the following Kern County zones, according to Watch Duty:

  • KRN-245
  • KRN-249
  • KRN-259
  • KRN-281-B
Firefighters from Monterey County extinguish smoldering wood posts on a cattle fence along Soda Lake Road after the Madre Fire burned through the area on July 3, 2025.
Firefighters from Monterey County extinguish smoldering wood posts on a cattle fence along Soda Lake Road after the Madre Fire burned through the area on July 3, 2025. David Middlecamp dmiddlecamp@thetribunenews.com
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Joan Lynch
The Tribune
Joan Lynch is a housing reporter at the San Luis Obispo Tribune. Originally from Kenosha, Wisconsin, Joan studied journalism and telecommunications at Ball State University, graduating in 2022.
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