Most homes are equipped with an HVAC — heating, ventilation, and air-conditioning — system to maintain a certain temperature ...

Heat waves are primarily caused by high-pressure systems that push warm air down onto an area and hold it there. During heat ...

Extreme heat is making air pollution worse, scientists say. And President Trump’s regulatory rollbacks could drive air ...

Air quality alert remains in effect for entire Chicago area. When will it improve? According to the NBC 5 Storm Team, the worst air quality in the country Friday was recorded in Ann Arbor, Michigan ...

Some air quality alerts remained in effect Friday evening, including in northern Minnesota, northern Indiana, southern Michigan and northern New York, according to the National Weather Service.

An air quality advisory also was called for all of east-central, south-central and southeast Wisconsin. Current conditions at O’Hare International Airport are light rain, fog and drizzle at 66 ...

The Iowa Department of Natural Resources has announced an air quality alert across Iowa that will be in effect until 6 a.m., Thursday, June 5. During this time, Iowa DNR expects the air to contain ...

The advisory for Orange, Ulster, Dutchess, Sullivan, Putnam, Rockland and Westchester counties lasts from 11 a.m. to 11 p.m. Wednesday.

The DNR is reporting an Air Quality Index level in the "Unhealthy" category for Milwaukee on June 4. The National Weather Service is urging sensitive groups, such as those with asthma, to limit ...

NEW YORK (WABC) -- An Air Quality Alert has been re-issued by the National Weather Service for parts of the Tri-State area for Thursday, as ground-level ozone may approach or exceed unhealthy ...

Smoke from Canadian wildfires worsened air quality in the eastern U.S. on Wednesday as several Midwestern states battled conditions deemed unhealthy by the federal government.