The extreme high temperatures & heat indices get the most attention, but the biggest effects of heatwaves are often due to the nighttime conditions.

The *minimum* heat index in #NYC over the past 24 H only dipped to a balmy ~85F for much of central NYC last night. #nywx #nycwx pic.twitter.com/bKnyQ8EdnN

— Nick P Bassill (@NickPBassill) September 6, 2023