Wildfire smoke to reduce air quality in Maine through Fourth of July weekend

PORTLAND PRESS HERALD • July 2, 2026

Wildfire smoke is expected to harm air quality in Maine through the Fourth of July weekend, and the ongoing heat wave could compound the effects. The Maine Department of Environmental Protection warned Thursday that wildfire smoke will likely spark a rise in particle pollution statewide to levels that are unhealthy for sensitive groups — and potentially unhealthy for all people for short periods. An air quality alert is in effect through Sunday for the entire state as smoke from neighboring Quebec moves into Maine.