Leite, AndreiaSantos, Ana JoãoPereira Silva, SusanaNunes, BaltazarMexia, RicardoRodrigues, Ana Paula2020-05-212020-05-212019-11http://hdl.handle.net/10400.18/6749Heatwaves can lead to increased mortality. Portugal has a Heat–Health Warning System (HHWS) in place (ÍCARO system). Researchers at the Instituto Ricardo Jorge send a daily report with heat-related mortality forecasts to key stakeholders (e.g. Heat–Health Action Plans (HHAP)). HHAP practitioners issue warnings and implement measures to prevent heatwaves-related mortality. ICARO is amongst the recommended data sources to assess risk and issue warnings but its use and understanding is unknown. Therefore, we aimed to assess ÍCARO’s use and understanding by key HHAP practitioners.engHeatMortalityÍCARO SystemDeterminantes da Saúde e da DoençaÍCAROPortugalSistema de Vigilânciaconference object