Following heavy rainfall and subsequent sunshine across Japan, there has been an alarming surge in the mosquito population. Health authorities are urging the public to take necessary preventative measures against mosquito bites. Mosquitoes often thrive during warm and humid conditions, which are abundant after a rainfall. The escalation poses potential public health risks as mosquitoes are carriers of various diseases.

Increased mosquito activity after episodes of heavy rain is a common issue in Japan. Japanese public health officials often issue warnings and provide prevention guidance, as mosquitoes can carry diseases such as dengue fever and Japanese encephalitis. Citizens are generally aware and proactive about such situations, using repellents, protective clothing, and avoiding outdoor activities during peak mosquito hours.

In the US or EU, similar action would be taken by authorities during mosquito outbreaks. Mosquito control programs are usually enforced to reduce populations, with public health messages centred around "drain, dress, and defend". Similarly, personal protection methods like regular use of repellents, window screens, and air conditioning are encouraged.