![]() Without AC, indoor temperatures can be much higher than outdoors, especially at night, and can continue for days after a heat wave. People who died from heat stress were most often exposed to the heat in their homes (71%, n= 62 of 88 records with detailed information). ![]() Emergency response to extreme heat must be coupled with equitable investments in structural interventions and heat mitigation measures to protect New Yorkers throughout the increasingly hot summer weather.Although the number of days meeting the National Weather Service extreme heat threshold has stayed constant, the number of non-extreme hot days, (i.e., days with temperature below the heat advisory threshold) is increasing, contributing the most to heat-exacerbated deaths each summer and highlighting the need for heat-mitigation outside of emergency response measures. Heat-exacerbated mortality is also higher in communities with a greater proportion of people with household incomes below the federal poverty line. Heat-exacerbated mortality is higher in neighborhoods that are home to a greater proportion of Black New Yorkers, reflecting the impacts of structural racism at the neighborhood level.An estimated 350 heat-exacerbated deaths were associated on average each year with hot days overall – daily maximum temperature above 82☏ – or about 2% of all natural-cause deaths over summer.From 2010-2018, there was an average of approximately 100 heat-exacerbated deaths (those caused indirectly by heat, such as by aggravating an underlying illness) each summer associated with extreme heat events, which are defined as at least 2 consecutive days with 95☏ or higher daily maximum heat index (HI) or any day with a maximum HI of 100☏ or higher, the threshold used for the City's heat advisory.
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