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Extreme heat mortality exceedance rates in Philadelphia County, PA. Mortality exceedance rates for Philadelphia county ZCTAs on days following those with 7:00 p.m. local time apparent temperatures greater than 34°C. ZCTAs with mortality rates significantly greater than the background rate are identified by a white cross. The location of Philadelphia International Airport (PHL), the source of meteorological data employed in this study, is represented by the airplane symbol.
