The information in the User Guide will help the reader:

• Understand the human health risk factors associated with extreme heat events.
• Recognize key vulnerability factors in specific populations.
• Understand options and opportunities for managing heat-health risk factors, for example, by tailoring and targeting health protective actions to at-risk individuals.
• Provide information for health administrators and health care workers to identify opportunities for integrating activities to reduce heat-health risks into work and planning.
• Facilitate the exchange of knowledge regarding extreme heat and health among health administrators, health care workers and the public.