Lethal heat waves in offing without global action; heat index would leap in NJ

TOM JOHNSON / NJ SPOTLIGHT – Extreme heat forecasts driven by climate change will be so widespread and frequent within the next few decades that the resultant conditions could affect daily life for residents more than any other facet of climate change, according to an analysis by the Union of Concerned Scientists.

Nearly everywhere in the continental United States, people will experience more days of dangerous heat in the next few decades, according to the study “Killer Heat in the U.S.: Climate Choices and the Future of Dangerously Hot Days.’’

Without global action to reduce heat-trapping greenhouse-gas emissions, the number of days when the heat index — or ‘’feels like’’ temperature — exceeds 100 degrees Fahrenheit would more than double from historical levels to an average of 36 across the country by midcentury and increase four-fold to an average of 54 by late century …

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