Czechia Faces Extreme Mosquito Activity: Repellents Essential This Weekend!

The Czech Hydrometeorological Institute (ČHMÚ) has issued a warning for unusually high mosquito activity this weekend.

The alert is valid nationwide and advises residents to be prepared for an increased presence of mosquitoes.

“In certain parts of the Czech Republic, current weather conditions favor intense mosquito activity, which could be particularly severe. Mosquitoes thrive in warm, still air with high humidity,” the agency announced on the social platform X.

The recent heavy rainfall has also contributed to the surge in mosquito numbers by creating ideal breeding grounds for larvae. The institute explained, “Not only do favorable weather conditions play a role, but population dynamics— which differ among mosquito species— also influence their prevalence.”

The peak of mosquito activity is expected on Saturday and Sunday, with signs of increased activity already noticeable by Friday afternoon, particularly in the Hradec Králové and Liberec regions.

Maps shared by the Czech Hydrometeorological Institute show that few areas across the country will be spared from these persistent pests. However, by Sunday, some relief is anticipated, especially in regions like Vysočina, Plzeň, Karlovy Vary, and Liberec.

Mosquito development is largely driven by weather conditions, particularly temperature and humidity. Warmer temperatures shorten the time it takes for female mosquitoes to feed on blood, a necessary step for egg production, as the institute has highlighted.

Climate change also plays a significant role in shifting mosquito populations. “Rising temperatures are pushing thermophilic species further north from their traditional southern habitats. Continued warming in the Czech Republic could lead to the introduction and establishment of new mosquito species, which may, in turn, affect the local incidence of mosquito-borne diseases,” the ČHMÚ warned.

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