A heat registry is like a neighbourhood watch but instead of keeping your community safe you are ensuring that your neighbours are protected from the extreme heat. To start a heat registry in your building all you have to do is get a group of tenants to agree to check up on eachother during the hot weather, this can include calling your neighbours on the phone to see if they are okay during the dog days of summer.
For more information on starting a heat registry check out
www.toronto.ca/housing/heatregistryguide.htm