On a late July morning, the sun is already broiling the National Mall in Washington, D.C. The air is so humid, even a loose shirt quickly turns into a sticky mess. Later, the heat index will top out ...

Feeling the heat? Whether you're working from home or trying to get a restful night's sleep, a cooling fan is, for many, a go-to during hot weather. Fans don't produce cold air, but rather, they ...