Park Fire Threatens Imperiled Spring-Run Chinook Salmon in Northern California

California’s fifth-largest wildfire, the Park Fire, is endangering some of the last refuges for the imperiled spring-run Chinook salmon in Tehama County. The fire has encroached into the Mill and Deer Creek watersheds, two of the three remaining creeks where these threatened salmon still spawn.

Experts warn that if the fire reaches higher altitudes, it could be catastrophic for the region’s spring-run salmon, a species already on the brink of extinction.

While flames are not the immediate threat, firefighting efforts and potential future heavy rains pose significant risks. Fire retardant, though necessary, is toxic to fish. Post-fire rains could wash ash, chemicals, and sediment into the creeks, smothering eggs and juveniles or causing oxygen levels to plummet.

Protected by the Endangered Species Act since 1999, Central Valley spring-run Chinook have seen dramatic declines. Last year, only 16 adults returned to Deer Creek and 34 to Mill Creek. These numbers signal a high risk of extinction.

The Park Fire could deliver a critical blow to this already fragile population.