The environment ministry says high pollution levels in southwestern Ontario are expected to disperse Tuesday.

Meanwhile, a smog advisory continues for Windsor, Essex, Chatham-Kent, Sarnia, Lambton, Elgin, London-Middlesex, and Huron-Perth.

Elevated air pollution levels had the air quality index approaching the poor threshold of 50 yesterday due to ground level ozone.

Residents are warned that heavy outdoor exercise while air quality is poor may cause respiratory symptoms such as coughing or shortness of breath.

Lightning safety reminder

The death of an Ottawa teen in a lightning strike has prompted Environment Canada to remind people how to protect themselves during a storm.

Meteorologist Geoff Coulson recommends keeping track of the latest forecast.

Joel Gauthier was biking during a thunderstorm last Friday and was struck by lightning while putting rain gear on under a tree.

He died the next day.