After years of ridicule on late night TV, the Department of Homeland Security is replacing color-coded terrorist threat alerts with public warnings that are more black and white. Officials said ...

New guidance from the Centers for Disease Control and Prevention shows the risk of COVID-19 transmission within a school, using a color-coded scale to show levels of vulnerability. Some data suggest ...

The National Weather Service this week announced a new color-coded scale to inform people of the possible impact of winter storms and their significance. Created by the Weather Prediction Center, the ...

With smoke from Canadian wildfires triggering air quality alerts in more than a dozen U.S. states, millions of Americans have suddenly become intimately familiar with the Air Quality Index, or AQI, a ...

OMAHA (AP) — Nebraska’s public schools will use a color-coded scale to decide what restrictions they’ll put in place when they reopen this fall despite the coronavirus threat, state officials said ...

Canadian wildfire smoke is affecting air quality in parts of Michigan. The EPA's air quality index (AQI) uses a color-coded scale to inform the public about air quality and associated health risks.