Air quality alert in effect for Connecticut due to smoke from Canadian wildfires.

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An air quality alert is in effect in Connecticut throughout Aug. 4 due to smoke from the ongoing Canadian wildfires, according to the National Weather Service.

The air is unhealthy for sensitive groups, like those with asthma, lung or heart disease, and older adults, the weather service said.

Those who could have trouble with the smoke should avoid being outdoors for extended periods, according to the NWS.

The alert will be in effect until 11 p.m. Monday, Aug. 4.

What the air quality will be like in Connecticut

Smoke is expected to impact portions of southern New England most heavily from around 8 a.m. to 8 p.m., the weather service said.

"A hazy sky is expected today due to smoke from a wildfire in Canada moving overhead," the weather service in Norton, Mass., said in a Facebook post. "Some of this smoke may get close to the ground later this morning into this evening."

In Norwich, widespread haze is expected with a high temperature of 89 degrees Fahrenheit.

Wildfire smoke map

https://firesmoke.ca/forecasts/current/?lat=41.541&lon=-86.858&zoom=5

CT counties under air quality alert

Here are the Connecticut counties where the air quality alert is in effect, according to the NWS:

  • Fairfield County - northern and southern

  • New Haven County - northern and southern

  • Middlesex County - northern and southern

  • New London County - northern and southern

Smoke rises from wildfire LWF090, the Caribou Lake Wildfire, in an aerial photograph northwest of Cold Lake, Alberta, Canada June 5, 2025. Alberta Wildfire/Handout via REUTERS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY
Smoke rises from wildfire LWF090, the Caribou Lake Wildfire, in an aerial photograph northwest of Cold Lake, Alberta, Canada June 5, 2025. Alberta Wildfire/Handout via REUTERS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY

What should you do during an air quality alert

Officials urged people to stay indoors to reduce exposure, and to limit strenuous activity. Exposure can cause short-term effects such as irritation of the eyes, nose, and throat, along with coughing, sneezing, runny nose, and shortness of breath.

It can be particularly dangerous for people in sensitive groups, such as children, older people, and those with chronic health conditions.

In Canada, several wildfires are blazing uncontrolled, according to the country's natural resources department.

In early July, Manitoba's government declared a state of emergency for its historic fires.

Material from USA Today was used in this report.

This article originally appeared on The Bulletin: Canadian wildfires causing air quality alert in CT. See smoke map

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