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Riverside County's fire record: the mountain and the map

One fire defines the high country's living memory. One remap redefined the desert's paperwork. Both belong in the honest version.

Quick answer: The Cranston Fire (2018) burned 13,139 acres in the San Jacinto Mountains, destroyed 12 structures, and evacuated more than 7,000 people from Idyllwild, Pine Cove, Mountain Center, Cedar Glen, and Fern Valley. Meanwhile the 2025 hazard remap moved the county's map in both directions: mountain and valley designations remain real and current while Coachella Valley acreage fell sharply. Both facts drive how Zone 0 (Zone Zero) lands here.

The record

The Cranston Fire, and what the 2025 maps did next

13,139 ac
Cranston Fire footprint, July 25 to August 10, 2018
12
structures destroyed in the San Jacinto Mountains
7,000+
people evacuated: Idyllwild, Pine Cove, Mountain Center, Cedar Glen, Fern Valley
84%
drop in Palm Springs' Very High acreage in the 2025 remap

The Cranston Fire is the high country's anchor event. Ignited in late July 2018, it climbed the San Jacinto Mountains through the forest that Idyllwild, Pine Cove, and Mountain Center live inside, and for two weeks the mountain communities lived the evacuation reality the hazard maps describe on paper. Twelve structures were lost; the forest setting that makes these communities worth living in is the same fuel that carried the fire.

The 2025 remap is the other half of the county's story. Updated modeling confirmed and preserved the mountain and valley designations while cutting the Coachella Valley's sharply: Palm Springs from roughly 8,000 Very High acres to 1,280, Desert Hot Springs and Palm Desert to zero. We treat both directions as news worth reporting accurately, because obligations follow the current map, not the old one. Community specifics live on each page: start with Idyllwild or Palm Springs.

Questions

Quick answers

What is Riverside County's defining modern wildfire?

For the communities this site covers, the Cranston Fire (July to August 2018): 13,139 acres in the San Jacinto Mountains, 12 structures destroyed, and evacuations covering Idyllwild, Pine Cove, Mountain Center, Cedar Glen, and Fern Valley, more than 7,000 people in all.

Why doesn't every city page here name a fire?

Because not every city has a verified one, and we don't invent them. Hemet, Temecula, Wildomar, and the desert-edge cities are framed around their confirmed hazard designations rather than a borrowed or fabricated fire event.

Did fire risk really go down anywhere in Riverside County?

On the maps, yes. The 2025 remap cut Palm Springs' Very High acreage by 84% and dropped Desert Hot Springs and Palm Desert to zero. The maps follow updated modeling in both directions, which is why parcel-level checks beat headlines in this county.

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