California is experiencing another record year for valley fever cases, with 6,761 reported through July, according to state health officials. This marks a significant increase over the 10-year average of 3,833 and surpasses last year’s total of 6,364. The disease, linked to drought and precipitation patterns, has seen a surge in cases in recent years.
Valley fever is most prevalent in the San Joaquin Valley and southern California, where the fungus Coccidioides thrives in dry, arid soil. However, case numbers are also rising in other parts of the state, including the northern Central Valley and along the Central Coast.
Experts link the rise to patterns of drought and precipitation, as well as climate change, which is expanding the fungi’s range into previously rare areas. The Centers for Disease Control and Prevention (CDC) has warned that people who attend outdoor events or activities in affected regions should take precautions.
Symptoms of valley fever are similar to COVID-19 and flu, making it difficult to diagnose. Health officials urge Californians, travelers, and healthcare providers to watch for signs and symptoms, such as cough, fever, trouble breathing, and tiredness lasting more than 7-10 days. In rare cases, the fungus can spread to other parts of the body and cause severe disease or death.
To reduce risk while traveling in affected areas, people should stay indoors, keep doors and windows closed when windy, use recirculated air, wet soil before digging, and wear N95 masks if outdoors. Pets are also susceptible to valley fever.
As the state continues to experience high case counts, health officials stress the importance of early detection and seeking medical help if symptoms persist.
Source: https://www.latimes.com/science/story/2025-08-15/valley-fever-cases-at-record-highs