The smoke floating over the border shared between America and Canada is now impacting air quality in states as far south as ...

The elevated levels of fine particulate matter resulting from wildfire smoke could present significant health risks.

"International and domestic travelers are essentially redefining how they discover the U.S.," an expert told Newsweek.

The U.S. is in peak flu season, as the CDC releases a map of influenza activity across the country. See which states are at the highest risk of flu activity.

This time, billions of them will hit in at least 12 states, experts say. This brood, Brood XIV, is considered the second largest periodical cicada brood, according to the University of Connecticut.