Butte County reports first West Nile virus death of 2026

In California, health officials have confirmed the first West Nile virus death in Butte County for the year 2026. The deceased individual was between 80 and 90 years old, although no further details about the person have been disclosed. This unfortunate event marks the third reported death from West Nile virus in the state this year, following similar fatalities in Glenn and Kings counties. As of August 13, Butte County has recorded six human cases of the virus, contributing to a total of 18 cases statewide in 2026. Health officials have noted that West Nile virus activity typically peaks in August in Butte County, prompting them to urge residents to take preventive measures against mosquito bites. These measures include using EPA-registered insect repellent, wearing long sleeves and pants during dawn and dusk, and draining any standing water where mosquitoes can breed. Additionally, the Butte County Mosquito and Vector Control District is providing free mosquitofish for residents to use in ponds and other standing water that cannot be drained. The West Nile virus is primarily transmitted through the bites of infected mosquitoes, and while about 80% of those infected do not exhibit symptoms, fewer than 1% may develop severe illness or neurological complications. Adults over the age of 50 and individuals with pre-existing health conditions are at a higher risk for severe illness, making it crucial for these populations to take extra precautions during peak mosquito activity periods.