Children, older adults, and people with respiratory or heart conditions such as asthma or COPD may begin to experience health effects, according to officials.

BUFFALO, N.Y. — Once again, an Air Quality Alert has been issued for Western New York until Sunday night. The alert runs until 11:59 p.m. Sunday and includes the entire region: Erie, Niagara, Orleans, Genesee, Wyoming, Chautauqua, Cattaraugus, and Allegany counties.