Los Angeles battles worst mosquito outbreak in years amid heat waves

Extreme heat and humidity fueled by El Niño have created ideal breeding conditions in Los Angeles, driving West Nile virus cases to a decade high and making the city the most mosquito-infested in America.

First covered Oct 11, 2026 · 4:00 AM PT · 1 article · no longer in the live window

Los Angeles battles worst mosquito outbreak in years amid heat waves — Image via theguardian.com

Coverage

31d Guardian Environment ‘A living hell’: how Los Angeles got taken over by mosquitoes — Heat and humidity have led to one of the worst mosquito years in recent history, with West Nile virus at a decade high Los Angeles might be best known for blue…

Primary sources

publichealth.lacounty.gov Arbo2026 (publichealth.lacounty.gov)

More coverage from around the web

lacounty.gov First West Nile Virus Death of 2026 Reported in LA County

dailytrojan.com Uptick in Los Angeles mosquitoes raises concerns about West Nile virus - Daily Trojan

ktla.com L.A. County confirms 1st human case of West Nile virus this year

cbsnews.com LA County reports highest number of West Nile virus cases since 2017 - CBS Los Angeles

wehoonline.com West Nile Virus 2026 Is Spreading Faster Than It Has in Two Decades Across Los Angeles

Appeared in: 2026-10-11 (#15) · 2026-10-12 (#16)

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