The Chicago area recorded ozone levels of 156 late Monday afternoon. Levels above 100 are considered unhealthy. Residents ...

Wildfires are raging near the Grand Canyon National Park, forcing the closure of the park’s northern rim. One of the ...

Heavy winds that swept through Black Canyon of the Gunnison National Park on Sunday night started “rapid fire spread” after a ...

The fire destroyed about 70 structures at the North Rim, including a water treatment facility causing a chlorine gas leak.

The White Sage and Dragon Bravo wildfires in Arizona have together burnt more than 40,000 acres and destroyed the historic ...

The Dragon Bravo Fire has destroyed dozens of structures and a water treatment facility, and the White Sage Fire, located in ...

The Dragon Bravo Fire burning inside Grand Canyon National Park has destroyed dozens of structures, including a beloved and ...

By BEN FINLEY Nearly 5 million people visited the Grand Canyon last year, from day trippers and campers to people sleeping ...

Grand Canyon National Park's North Rim was evacuated and will remain closed for the rest of the season because of the Arizona ...

Additional plumes of smoke from Canada's active wildfires prompt officials to issue a statewide air quality alert on July 14.

Wildfires have forced evacuations for visitors and staff at two national parks — Gunnison and the Grand Canyon — in the U.S.

The White Sage and Dragon Bravo fires have burned a combined 24,000 acres, only miles apart from one another near the Grand ...