ALT text on image reads "ozone action day alert"

ALT text reads "air quality health advisory: stratospheric ozone."

ALT Ozone action day alert text in blue on yellow background over image of Denver cityscape.

ALT Text on image reads "Air Quality health advisory: stratospheric ozone."

ALT Blue advisory text highlighted in yellow, on a blue background over photo of a landscape.

ALT Ozone Action Day alert text in yellow on a blue background.

ALT Blowing dust alert text on yellow background over image of trees and haze. Logos at the bottom.

ALT Wildfire smoke alert text highlighted in yellow on blue background over image of smoke rising above a hillside. Logos at the bottom.

ALT Wildfire Smoke alert text over image of smoke plume. Logos at the bottom.

ALT Wildfire smoke alert text over image of smoke plume. Logos at the bottom.

ALT Air quality health advisory for multiple pollutants text on a blue background over an image of mountains. Logos at the bottom.

ALT Wildfire smoke alert text over a photo of heavy smoke coming from a wildfire. Logos of Colorado Department of Public Health and Air Pollution Control Division at the bottom.

ALT yellow ozone action day alert text on blue background, over image of denver skyline, with mountains in the background. Logos at the bottom.

ALT air quality alert text on yellow background over image of smoke. logos at the bottom left.

ALT Ozone action day alert text on blue background over image of mountains and wildflowers. Logos at the bottom.

ALT Air Quality advisory text on yellow background over image of wildfire smoke. Logos at bottom left.