Vulnerable groups are urged to avoid outdoor activity in multiple parts of southern California due to air pollution.

The National Weather Service said the alert will be in effect until Sunday morning in the Santa Clarita Valley and Saturday ...

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 ...

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

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