ALBANY, N.Y. (AP) - State health and environmental officials are advising people to stay in cool places and avoid unnecessary outdoor exercise because heat is going to drive up ozone levels in the lower Hudson Valley, New York City and Long Island.
The air quality advisory is in effect from 11 a.m. to 11 p.m. on Friday.
Warm, muggy weather combined with automobile exhaust and out-of-state emissions sources can lead to the formation of ground-level ozone, a major component of smog. High ozone levels can cause shortness of breath, chest pain, and coughing, especially in those with respiratory diseases such as asthma.
When outdoor levels of ozone are elevated, going indoors will usually reduce your exposure.
(Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)