Los Angeles is experiencing a surge in mosquitoes and West Nile virus infections, with public health officials warning of increased risk as the vector season continues.

Public health data show LA County recording over 180 West Nile virus cases this year, the highest in nearly a decade, reflecting a broader national trend of rising mosquito-related health risks.

Aedes and Culex mosquitoes are the two species driving the problem, with Aedes in suburban and valley areas and Culex transmitting West Nile after feeding on infected birds.

Two main mosquito species drive the risk: Aedes (aggressive, human-biting and capable of spreading dengue, Zika, chikungunya, yellow fever) and Culex quinquefasciatus (primarily bird-focused, linked to West Nile after biting birds).

Vector control efforts include traps, adulticide spraying, and experimental sterile-male releases (RIDL) to reduce populations, though these measures face scalability and cost challenges.

Nearby Orange County reports show 850 traps tested positive for West Nile virus, underscoring regional containment challenges.

Officials note that warmer-than-usual winters and humid summers have extended mosquito activity, creating a persistent, moist environment that supports breeding.

Sterile-male release programs have achieved notable reductions in some sites but remain expensive and unevenly adopted, limiting widespread impact.

West Nile virus transmission occurs when Culex mosquitoes bite infected birds; about 20% of infections cause flu-like symptoms, while roughly 1 in 150 can lead to severe neurological illness.

Practical prevention tips emphasize eliminating standing water, using effective repellents, wearing protective clothing, and considering tools to manage lingering adults.

Public awareness is reinforced by local reports of intense mosquito activity affecting backyards and outdoor dining in communities like El Segundo.

Officials warn that mosquitoes will remain a bigger part of life in Southern California, requiring ongoing prevention, control measures, and public cooperation.