91° air temp + 79° dewpoint (tied with yesterday as my highest dp ever) = heat index of 107° currently in Fitchburg, MA! ☀️🌡🥵 #MAwx @WX1BOX @NWSBoston @jreineron7 @KevinBoston25 @wbzweather @PeteNBCBoston @WCVBweather pic.twitter.com/Xl7VghgQG2

— Greg Forrister (@GregForrister) August 12, 2021