A new wildfire ignited in Oregon on Thursday afternoon, and smoke from the flames is causing unhealthy air quality.

Wildfires are becoming more common than ever amid the ravages of climate change — and those who breathe in their smoke, even far away from the source of the blazes, are at far greater risk than scientists previously realized.

Researchers are now assessing the mortality impacts of wildfire smoke, as it contains pollutants like PM2.5 that have been previously linked with death and morbidity. However, they’ve now found that they had drastically underestimated just how dangerous wildfire smoke is.

Officials issued an air quality advisory as smoke from the Flat Fire reached unhealthy levels in multiple counties.

A pair of wildfires burning in the Florida Everglades grew in size as they sent heavy plumes of smoke across southeast Florida.

Like much of the U.S., Chicago was under a thick hazy blanket of wildfire smoke, creating dangerous conditions for anyone who breathes, but especially for the elderly and children. As Chicagoans and others across the midwest and northeast stared up at the orangish sky and checked the air quality warnings on their phones,

Wildfires have always affected air quality in New England. But scientists say climate change is changing how they burn and bringing more smoke to the region.

MISSOULA — A wildfire west of Missoula is kicking up smoke on Wednesday afternoon. The Dog Fire is burning in the area of mile marker 15 along Southside Road, according to the DNRC Interactive Fire Map. Smoke can be seen from the Missoula and Frenchtown areas.