I never read anything they wrote about 700ish h.p. wedges in little engine compartments , setting idleing in 90 plus temps , w/ 90`s humidity , at a stoplight in collinsville , okla. !--makes a world of diff. !
Engines do not care about humidity. Actually, moisture helps to cool the intake charge a bit. The awful ambient temperatures are more of an issue for us drivers. As long as the cooling system is up to snuff, it will handle a lot of ambient heat.