Ankeny residents received a Code Red alert Thursday, leading many people to ask: What is a Code Red?

"Code Red," "Code Blue," "Code Black" -- people sometimes wonder what these terms mean, especially if they're fans of TV hospital dramas. Technically, there's no formal definition for a code, but ...

An AQI "Code Red Fine Particles Action Day" means the air is unhealthy to breathe. Here's what you should know to help protect yourself.

The air quality in south-central Pennsylvania is being affected by smoke from forest fires in Canada, prompting a Code Red alert.

The Code Red messages that went out to many residents of Hamburg and Lackawanna on Tuesday were alarming: Police were searching for four men who they said could be "armed and dangerous." "Please ...