The app was created by the Ministry of Health and the Department of Epidemiology of the Lazio Region Health Service - ASL Roma 1. It offers: the levels of health risk in each city for the three days of heatwave forecast through a map and a graphical summary of the bulletins for easy reference from portable devices; recommendations for prevention aimed at the population and subgroups at greatest risk and links to download guidelines, brochures and information material; and an interactive map of floors, services and useful local numbers.