It is the most difficult to control the plague of mosquitoes, I agree with you, before both dragonflies and bats were seen more, even in the city. Now the problem (at least here) is the water that stagnates, that is not cleaned and filtered properly, and that there are not so many fish. Sometimes even with sprays or creams you can't be safe from bites.
I love the heat, but I hate the mosquitoes, it's a great duality...