By 2025, tiger mosquitoes have colonised 81 of France's 96 metropolitan départements, with projections indicating full colonisation by 2030. This poses a significant risk as they transmit diseases such as dengue fever, chikungunya, and the Zika virus. In 2025, there were 25 locally-transmitted cases of chikungunya, highlighting the issue's severity. Their spread has been facilitated by climate change, and current control measures like traps are insufficient. Experts recommend eliminating standing water and using repellents as effective preventive strategies against these mosquitoes.
In 2025, 81 of the 96 metropolitan départements of France had been colonised by tiger mosquitoes, which spread dengue fever, chikungunya, and the Zika virus.
Tiger mosquitoes are expected to have colonised the whole of France by 2030, prompting concern over the spread of viruses and recorded 25 locally-transmitted cases of chikungunya this year.
The tiger mosquito populations have been growing steadily in France for the last two decades, in part thanks to rising temperatures due to the climate crisis.
Experts advise keeping standing water away from homes and wearing mosquito repellents, as traditional methods like traps are proving ineffective.
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