Detroit, we have a code maroon! With the smoke from hundreds of Canadian wildfires wafting around the globe, millions of Americans are learning that, when it comes to air quality, there’s something ...

This week, millions of Americans are anxiously scanning air quality maps focusing on two colors: red and purple. Red indicates "unhealthy" air quality, and purple? "Very unhealthy." When did purple ...

Records for particle pollution were just smashed across the Washington region. Many were first topped Wednesday and then surpassed Thursday as thick smoke drifting in from Canada peaked. Code Red ...