Glendora, CA
Glendora, CA's wildfire risk, in USFS's own numbers
USFS's Wildfire Risk to Communities model puts Glendora at the 100th national percentile for risk to structures, in USFS's highest wildfire-risk band nationally — a score built from 20,209 actual buildings. (Source: USFS's Wildfire Risk to Communities methodology.)
Separately from the risk score above, Glendora's burn probability — fire likelihood with no building count factored in — sits at the 99th percentile nationally.
Where Glendora's buildings actually sit
USFS puts 48.3% of Glendora's 20,209 buildings in the Indirect exposure zone, versus 4% Direct and 47.6% Minimal — a place where the fire doesn't need to reach the structure directly for embers to. At 20,209 buildings, this is a substantial built environment, so the shares below describe a real population of structures, not a handful of edge cases.
Where Glendora ranks
Glendora's risk sits at a similar level relative to California (95th percentile statewide) as it does nationally (100th) — this place isn't unusual for its own state either way. Among the 31,521 US communities USFS scores, Glendora ranks 122 for wildfire risk (1 is highest) and 697 by building count (1 is largest). Within California alone, it ranks 79 of 1,570 places by risk. See the full county-by-county picture for California on its state page.
Glendora and the insurance market
Glendora sits in California, one of two states that legally require a wildfire-risk disclosure at sale. California's FAIR Plan, the state's insurer of last resort, ended 2025 with 668,609 residential policies after adding 21,859 in Q4 alone — the kind of market shift a 100th-percentile score like Glendora's can end up mattering for. More on the disclosure law.
Hardening a home in Glendora
Because 48.3% of Glendora's buildings sit in the Indirect zone, sealing the ember pathway (vents, roofing, gutters) is the intervention this page's data actually supports — see the home-hardening guide.
More on how this number was built
The methodology guide shows exactly how USFS turned 20,209 counted buildings into the percentiles shown above for Glendora. For more on what indirect exposure implies beyond Glendora, see the exposure-zones guide.