Montreal this morning: Cloudy and smog warning in effect

Mainly cloudy with a high of plus 3 Celsius.
Tonight: Clearing in the evening with a low of minus 2 C.
Smog warning in effect for: Montreal Island, Châteauguay–La Prairie, Laval, Longueuil and Varennes.
High concentrations of fine particulates are expected and will result in poor air quality, it should persist through Wednesday morning according to Environment Canada.
Smog especially affects asthmatic children and people with respiratory ailments or heart disease. It i