Wildfire smoke doesn’t just cloud the horizon, it can chemically change the air at ground level and in layers of the atmosphere miles above.

Wildfire smoke doesn’t just cloud the horizon, it can chemically change the air at ground level and in layers of the ...

Rio Blanco County officials lifted some mandatory evacuation and pre-evacuation orders Friday afternoon for the Elk and Lee ...

Hundreds of firefighters are battling the Canyon Fire, which ignited Thursday afternoon in Ventura and Los Angeles counties, ...

It’s among the wildfires that are raging in North America and Europe as climate change creates dangerous conditions, posing ...

More than 130,000 acres of land have burned in separate wildfires in Delta, Dolores, Garfield, Grand, Mesa, Moffat, Montrose, ...

Chicago faces a persistent heatwave with temperatures forecasted to reach the mid 90s, minimal rain chances, and potential ...

An air quality alert was issued by the National Weather Service in Milwaukee-Sullivan at 1:53 p.m. on Friday, Aug. 8.

Elevated fire weather concerns are expected to continue through Monday “given interior heat, low humidity, and daily ...

Though wildfire smoke was to blame for poor air quality earlier in the week, Wednesday and Thursday's alerts are due to high ...

The Gifford Fire that has scorched close to 100,000 acres of rural San Luis Obispo County showed some signs of relenting overnight into Friday as fire crews worked to contain the blaze.

The Gifford Fire has scorched more than 96,000 acres of California’s Central Coast, becoming the state’s largest wildfire of ...