Heat waves kill more people in the United States each year than any other natural hazard, and many regions worldwide are experiencing more frequent and more severe heat waves. But not all people and not all places have the same vulnerability to heat-related health effects. Identifying those who are more vulnerable will be critical to effective public health interventions. In this podcast, Colleen Reid discusses an innovative method for mapping the sections of urban areas across the United States where residents are more likely to suffer heat-related health effects. Reid is the lead author of "Mapping Community Determinants of Heat Vulnerability" and a PhD candidate at the University of California, Berkeley. Visit the podcast webpage to download a full transcript of this podcast.