Overview

• The Michigan Department of Environment, Great Lakes, and Energy and the Michigan Department of Environmental Quality have issued air quality advisories for fine particulates across the Upper Peninsula from 3 p.m. Tuesday through noon Thursday, covering all Chippewa and Mackinac counties.
• The Pennsylvania Department of Environmental Protection has issued code orange alerts for Berks, Lehigh and Northampton counties until midnight Thursday, and the Delaware Valley Regional Planning Commission has extended similar warnings to Bucks, Chester, Delaware, Montgomery and Philadelphia counties.
• Smoke from Canadian wildfires will spread across the western Upper Peninsula Tuesday afternoon and push south and east early Wednesday before a southerly wind shift later in the week is expected to disperse the haze.
• Particulate (PM2.5) concentrations are forecast to remain in the unhealthy-for-sensitive-groups range through Thursday with potential hourly spikes into the unhealthy category.
• Officials advise limiting strenuous outdoor activities, keeping windows closed overnight and running central air systems with MERV-13 filters while monitoring for wheezing, coughing or chest tightness.