Mosquito nuisance peak on Mediterranean coast after rains

EID Méditerranée is intervening on 6000 ha following massive common mosquito outbreaks, particularly in Gard, Hérault, and Bouches-du-Rhône.

Generic image: with mosquitoes visible in the air.
AI

Generic image: with mosquitoes visible in the air.

Following heavy rainfall and sea winds since September 30th, significant outbreaks of common mosquitoes have been observed across over 6000 ha of the Mediterranean coastline, particularly affecting Gard, Eastern Hérault, and Bouches-du-Rhône.

Despite a rapid mobilization of all its intervention resources by EID Méditerranée from October 1st to 9th, adult mosquitoes are currently causing significant nuisance. These weather conditions led to a rapid rise in water levels in coastal wetlands, triggering massive outbreaks of common mosquito species, mainly Aedes caspius and Aedes detritus.
EID Méditerranée teams combined aerial and ground methods to eliminate larvae before they transform into adult mosquitoes. Operations were adapted to weather conditions, sometimes limited by wind, fog, and cloud cover.
The organization explains that while treatment never eliminates 100% of larvae, the exceptionally high densities observed during this episode are sufficient to cause significant nuisance after emergence. Furthermore, the tiger mosquito remains active, and the rains have favored its development.
The nuisance is expected to gradually decrease with the natural disappearance of adult mosquitoes. EID Méditerranée continues to monitor wetland areas to limit the discomfort experienced by residents of the Mediterranean coast.
Based on information from the official source: Mairie de Saint-Just (16/10/2026)