A statewide air quality alert is in effect for Massachusetts due to Canadian wildfire smoke, potentially the worst air quality day of the year for Boston. The Massachusetts Department of Environmental Protection advises sensitive groups, including children, the elderly, and those with respiratory issues, to limit outdoor activities. The highest smoke concentration is expected in western Massachusetts, with hazy conditions and reduced visibility impacting Logan Airport. While some improvement is anticipated by Tuesday, smoke will remain.

Prepared by Olivia Bennett and reviewed by editorial team.