Today's smog alert means that it will only cost you a dollar to ride the buses in Laval. The Societe de Transport de Laval offers this special fare whenever Environment Canada issues a smog warning. If you'd like to check it visit the STL website.
If you don't live in Laval and you'd like to look into public transit options during this week's heat then you might want to check fares and schedules:
CITCRC- Buses in Chambly, Richelieu and Transport
STM- Montreal buses and metros
AMT-Commuter train lines