Particularly hot summers that lead to outbreaks of malaria and yellow fever are often associated with tropical and subtropical regions. One notable area where this has been observed is in parts of Africa, the Americas (especially in the southern United States, Central America, and parts of South America), and Southeast Asia. These regions provide the warm, humid conditions that are conducive to the breeding of mosquitoes, which are the primary vectors for both malaria (transmitted by Anopheles mosquitoes) and yellow fever (transmitted by Aedes mosquitoes).
For instance, in the United States, cities in the southern region, such as New Orleans and parts of Florida, have historically experienced outbreaks of yellow fever, particularly during the hot summer months. Similarly, in West Africa, high temperatures and seasonal rainfall contribute to the transmission of malaria.
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