This Toolkit is intended for use by public health and emergency management officials who are developing or updating heat-health communication strategies. It is designed to gide the development of targeted heat-health communication campaigns and necessary outreach products for specific audiences.To this end the Toolkit provides: 1.) An overivew of extreme heat events and the potential health risks to all Canadians, especially those most vulnerable to heat-health impacts 2.) Guidance on communicating heat-health risks and strategies, including scienifically sound health messages to support the development of effective communication strategies 3.) Guidance to help develop community-specific and tailored heat-health communication campaigns 4.) Template materials for public health and emergency management officials, such as fact sheets, a media release and checklists.