The Federal Communications Commission (FCC) established a new alert code Wednesday for missing or endangered people in Tribal communities.

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Baltimore City is under a Code Red Extreme Heat Alert for the next several days due to high heat and humidity. Today marks the start of a very long stretch of dangerously hot and humid days. This ...

A Code Red Air Quality Alert is in effect Thursday, which means air pollution concentrations within the region have become unhealthy for all.

It's staying dry and sunny in metro Atlanta on Friday, and a Code Orange air quality alert has been issued. But it’s not caused by Canadian wildfires.

A Code Blue alert for Lancaster County will be in effect from 3:30 a.m. to 10 a.m. Saturday, and again from 7 p.m. Saturday to 10 a.m. Sunday.

A "Code Blue" alert is issued when temperatures, including wind chill, are projected to be 13 degree or below, or when other conditions present a substantial health threat.

Plan for a muggy Tuesday morning with areas of patchy fog. A Code Orange Air Quality Alert is in effect for the D.C. area.

Most counties in Utah met the criteria for a Code Blue alert on Saturday as temperatures dropped into the teens.