State and federal agencies issued air quality warnings across Colorado through the weekend, as ground-level ozone and drifting wildfire smoke pushed pollution to levels that officials said could harm residents, especially children, older adults and people with heart or lung conditions.

The latest alert from the Colorado Department of Public Health and Environment (CDPHE) came just days after similar circumstances led to warnings throughout the state prompted by wildfire smoke from regional fires including the Derby fire . The fire, which is currently 0 percent contained, has burned over 4,000 acres as of Saturday afternoon.

These conditions could increase respiratory symptoms and breathing discomfort for sensitive groups and active people, and state health officials urged limiting outd

See Full Page