Twenty-one New Yorkers died last year as a direct result of heat — the highest number of such fatalities in a decade. And nearly 500 New Yorkers on average die annually from causes related to heat, with the vast majority occurring on days that may not raise alarms for city dwellers: hot, but not sweltering, […] The post Heat Killed 21 New Yorkers Last Year. It’s the Highest Tally in a Decade.