Campers often expect campfire smoke to rise straight up or drift gently with the wind, but mountain valleys behave very differently. Their narrow walls, shifting temperatures, and irregular terrain ...

A weather pattern that’s funneling smoke from fires burning in Northern California and Oregon will bring with it a Spare the Air alert on Wednesday, air officials said. The Bay Area Air Quality ...

Forecasters with the National Oceanic and Atmospheric Administration say the smoke and the oppressive heat that have plagued different parts of the U.S. will continue to be a problem for some time.