Map of the surveyed districts (IMAGE) Politecnico di Milano Caption Map of the surveyed districts: 18 NILs (Local Identity Nuclei - administrative divisions recognized by the Municipality of Milan https://www.pgt.comune.milano.it/psschede-dei-nil-nuclei-di-identita-locale/nuclei-di-identita-locale-nil) highly vulnerable to heat in cardiovascular contexts and 20 low vulnerability NILs were identified. Among the NILs with high vulnerability and high number of residents are those of Buenos Aires - Porta Venezia- Porta Manforte, Loreto Casoretto Nolo, via Padova - Turro- Crescenzago and Quartiere Gallaratese - Quartiere San Leonardo - Lampugnano. The districts with many residents and low vulnerability are Gorla Precotto, Villapizzone, Porta Magenta, Chiesa Rossa. Milan has also been divided into three socio-urban clusters: Central, Residential and Suburban. In these clusters, five key variables - surface temperature, fountain density, percentages of seniors, women and high educated residents - have a significant impact on cardiovascular vulnerability during hot weather. Regarding highly vulnerable NILs, over 210,000 residents (66% of total residents in high vulnerability NILs) are concentrated in the Central cluster, while in low vulnerability NILs almost 200,000 residents (70% of the population of the least vulnerable NILs) reside in the Residential part of the city. Credit Politecnico di Milano Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.