Here is a list of weather-related cancellations and closures so far (as of 7:27pm EST)
GTHL games cancelled: Tonight’s scheduled games are postponed and will be rescheduled for a later date
Peel District School Board: All activities that begin after school hours cancelled tonight
Sheridan College: Evening classes cancelled. Campus will close at 5 p.m. due to storm.
Humber College: All campuses closed at 6 p.m.
Centennial College: All campuses closed at 3:30 p.m.
York Region District School Board: All continuing education night classes, community permit activities cancelled tonight
University of Toronto Mississauga: All facilities will close at 6 p.m.
Durham Region District School Board: all night classes, community permit activities
Halton Region District School Board: all night classes
York University: Keele and Glendon campuses closed as of 4:30 p.m.