UCLA Heat Maps.

This interactive map of heat-related health outcomes in California shows the excess daily emergency room visits that occur on an extreme heat day compared to the usual, non-extreme heat day. It shows this excess by county and zip code. By using the map, public health professionals, emergency service providers, urban planners, legislators, health and human services providers, non-governmental organizations, and communities themselves can find out which neighborhoods across the state are at greatest risk of harm during extreme heat events.