Beginning on Monday, Fairfax County’s air quality index numbers began to increase, peaking at 314 on Thursday morning, which is classified as hazardous levels of air pollution.

Wildfire smoke from Canada covered our state, pushing air quality indexes into the “hazardous” range and leaving millions scrambling for N95 masks, air purifiers and safe shelter. Schools closed.

According to the Maricopa County Air Quality Map, several parts of the Valley had an air quality level listed in the "very ...

Hazardous air quality is shown in a June 11, 2025, map from the South Coast AQMD. The AQMD hasn’t pointed to a specific cause, though a few wildfires in Southern California have likely had an ...

By bnm Tehran bureau Tehran's air quality has plunged to a critical 'very unhealthy' and 'hazardous' state on July 7, with the city's Air Pollution Index (API) soaring past 300 in the last 24 hours, ...

For the latest news, weather, sports, and streaming video, head to KTLA. Hazardous air quality is shown in a June 11, 2025, map from the South Coast AQMD.

Columbus' air quality is once again expected to become unhealthy for sensitive groups on June 12 due to smoke and ozone production, according to the Mid-Ohio Regional Planning Commission.

Dhaka, the overcrowded capital city of Bangladesh, has ranked 22nd on the list of cities with the worst air quality with an AQI score of 72 at 10:15am on Sunday. Dhaka’s air was classified as ...

Before sunrise, the air quality index was a "hazardous" 422 in Wilmington. At 3 p.m., Wilmington and Newark were both in the moderate range.

BUFFALO, N.Y. — Once again, an Air Quality Alert has been issued for Western New York until Sunday night. The alert runs until 11:59 p.m. Sunday and includes the entire region: Erie, Niagara ...

A new law was hailed as a win for Wasatch Front air quality. But it's not yet clear whether it will lead to any additional, independent monitoring near US Magnesium.

PHILADELPHIA (WPVI) -- The National Weather Service has declared an "Orange" air quality alert in the Philadelphia metro area and several New Jersey counties for Thursday. In Pennsylvania, Bucks ...