S1 Text - Rise in heat related mortality in the United States

Fig A. Regional correlations between annual crude death rate (deaths per 1,000,000) by hyperthermia and total heat severity (measured by the HSCI H ), 1981–2022. Fig B . Smoothed Event Characteristic trend plots for each climate region (1981–2022; α = 0.3). Data within these plots are reported only for years with corresponding heat mortality data (only assessed if at least 9 cases of heat mortality (hyperthermia) are reported and therefore, trends in regions with less than 42 years should be viewed with some caution. Fig C. Regional correlations between annual crude death rate (deaths per 1,000,000) by hyperthermia and heat exposure days, 1981–2022. Fig D. Regional correlations between annual crude death rate (deaths per 1,000,000) by hyperthermia and total event intensity, 1981–2022. Fig E. Regional correlations between annual crude death rate (deaths per 1,000,000) by hyperthermia and average event size, 1981–2022. Table A. Significant Pettitt’s Test Results. Regions denoted with an asterisk (*) are with relatively fewer years of heat mortality data (less than 30 years of data out of 42 years total) and thus should be interpreted with extreme caution. Table B. Trends in humid heat characteristics and severity. Trends in characteristics are calculated across the 1981–2022 period. Table C. Pearson Correlation Coefficient (R) of Individual Characteristics (size, intensity, and number of days) and Total Heat Severity (HSCI H ) vs. Crude Mortality Rate (Crude Death Rate per 1,000,000). (DOCX)