The index assesses heat vulnerability at the population-level, using three key factors:
- Sensitivity to heat and illness
- Exposure to extreme heat and the elements of our built environments which regulate temperature
- The capacity to adapt to extreme heat and lessen harm.
The HVI interactive tool displays how heat vulnerability, sensitivity, exposure, and adaptive capacity differ throughout Multnomah County. The tool also includes the 19 indicators used to build the index. By making this tool available to the public, it can be used to help guide long-term investments to reduce heat and short-term response plans during heat events.