Placer Mosquito officials confirmed the county's first West Nile–positive mosquito samples of 2026 and are expanding trapping and targeted treatments. Residents are urged to use repellents and report dead birds.

Sacramento County has recorded its first human West Nile infection this year; officials say the patient is recovering and urge repellents, backyard cleanups and reporting dead birds.

Sacramento‑Yolo Mosquito ↑ Vector Control will release non‑biting, Wolbachia‑carrying male mosquitoes across roughly 120 acres in Rosemont this July–October to suppress Aedes aegypti.