As our fossil-fuel-warmed world careens into what’s likely to be months of record global-scale heat goosed by El Niño, early season heat waves are already proving tragic this summer. Most of central and northern Europe was assaulted over the past week by the continent’s worst heat wave ever recorded before the core summer months of July and August, and at least 1,300 people have died as a result.
Meanwhile, extreme heat watches extended along the U.S. East Coast on Monday from New Jersey and eastern Pennsylvania to southern Maine, foretelling a miserable and potentially record-setting heat wave that will run from midweek into the Fourth of July holiday across much of the U.S. east of the Appalachians. Heat indexes – reflecting air temperature plus humidity – may exceed 110 degrees across much of the extreme-heat watch area.
As of midday Monday, the official forecast for Washington’s Reagan National Airport was for highs of 99°F, 103°F, 103°F, and 101°F for Wednesday through Saturday, July 1-4. The city has never recorded two consecutive days of 103°F, and only a handful of heat waves have produced four-day strings of 99°F. In New York, Central Park’s forecast highs of 91°, 96°, 95°F, and 91°F for July 1-4 wouldn’t be as historic, but they would still make for a hot, sweaty lead-up to the holiday, especially with lows possibly staying above 80°F for two nights.
