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Valley fever cases reach record highs in California

California health officials report rising Valley fever cases through July 2025, signaling ongoing public health and climate linked challenges.

August 15, 2025 at 10:00 AM
blur California valley fever cases hit record highs again in 2025

California reports rising Valley fever cases in 2025, signaling ongoing public health and climate-linked challenges.

Valley fever cases reach record highs in California

Through July, California health officials recorded 6,761 Valley fever cases, well above the 10 year average of 3,833 for the same period and a step up from last year’s 6,364. Last year set a record with nearly 12,500 cases. Officials caution the current total may rise as reporting delays are common.

Key Takeaways

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Cases are trending higher than the 10 year average through July
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Monterey County saw a sharp rise in cases
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Valley fever is caused by Coccidioides spores in soil
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The illness is not contagious
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Symptoms mimic flu or COVID complicating diagnosis
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Public health messaging must emphasize early detection and protection
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Reporting delays mean counts may rise later in the year

"Valley fever is here to stay in California"

Statement from state health director on the persistence of the illness

"We want to remind Californians to watch for signs and symptoms to help detect it early"

Pan urging vigilance among residents and clinicians

The data show how drought and weather patterns are shaping health risks beyond the usual. A rising case load calls for stronger surveillance, faster diagnostics, and clearer guidance to help clinicians separate Valley fever from flu or COVID. The trend toward new geographic areas, including the Central Coast, suggests climate related changes in where the fungus can thrive.

Highlights

  • Dust storms rewrite California's disease map
  • Public health needs steady action not alarms
  • A warming climate redraws the map of risk
  • Vigilance is the first line of defense

As climate and drought intersect with health, readiness becomes a public responsibility.

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