Responding to the record number of heat-related deaths and the planet’s warmest year on record, U.S. agencies have developed HeatRisk, a tool to help people prepare for and avoid the dangers of extreme heat. HeatRisk combines weather and climate data with health information to provide a forecast and risk level for zip codes across the U.S. It also includes guidance for caregivers and medical professionals on how to help vulnerable populations stay safe in hot weather.