Millions in Colorado Advised to Remain Inside Due to Wildfire Smoke

The National Weather Service has issued an air quality health advisory for parts of Fremont County, urging residents to stay indoors until conditions improve.

Mar. 24, 2026 at 9:18am

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The National Weather Service (NWS) has issued an air quality health advisory to millions of residents across parts of south central Colorado, urging them to remain inside due to heavy smoke caused by a wildfire which started last week. The NWS areas within Fremont County, including Penrose, Fremont, and Canon City, are expected to be affected by the wildfire smoke until Tuesday.

Why it matters

Wildfire smoke can pose serious health risks, especially for sensitive groups like the elderly, young children, and those with existing heart or lung conditions. Residents in the affected areas are being advised to take precautions to keep indoor air as clean as possible until the smoke clears.

The details

The wildfire, known as the 24 Fire, started on Wednesday near Mile Marker 24 along Colorado Highway 115. It has already covered more than 7,300 acres, forcing the closure of the highway between Fort Carson and Penrose. Officials say dry conditions, low humidity, and wind have fueled the fire's rapid growth, and the highway is expected to stay closed at least through the end of the week.

  • The wildfire started on Wednesday, March 19, 2026.
  • The NWS air quality advisory is in effect until Tuesday, March 25, 2026.

The players

National Weather Service (NWS)

The federal agency that issues weather forecasts and warnings, including the air quality advisory for parts of Colorado due to the wildfire smoke.

Centers for Disease Control and Prevention (CDC)

The national public health institute that provides guidance on the health risks posed by wildfire smoke and how to protect oneself.

Colorado Sun

The local news outlet that reported on the details of the 24 Fire wildfire.

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What’s next

Officials say the highway is expected to stay closed at least through the end of the week, with daily reassessments on the status of the wildfire and smoke conditions.

The takeaway

This air quality advisory highlights the importance for residents in affected areas to closely monitor conditions and follow public health guidance to protect themselves from the potential health risks posed by wildfire smoke, especially for vulnerable populations.