National Weather Service officials issued an air quality alert set to expire at midnight Saturday for the Chicago and ...

Air quality alerts have been issued across most of the Midwest, and hundreds of wildfires are burning across Canada.

Minneapolis faced severely degraded air quality, ranking among the worst globally due to smoke drifting from Canadian ...

Por MATTHEW BROWN, COLLEEN SLEVIN y LISA BAUMANNLas autoridades están rastreando una zona montañosa del oeste de Montana en ...