NOAA data reveals USA heatwaves much hotter in past: ’38/50 states or 76% recorded their high-temperature records before 1955 – 43 states measured their high temp records in or before 1985′

Here’s a map you won’t see often.

U.S. “all-time” record high maximum temperatures by state.

38/50 states (76%) recorded their high temperature records before 1955. 43 states measured theirs in or before 1985.

Think this summer has been hot? It has been hotter before. pic.twitter.com/yr68kPpiNJ

— Chris Martz (@ChrisMartzWX) July 22, 2024

Hi Dr. Overpeck.

I'm not sure what increase you're talking about.

Heatwaves can be defined as a ≥3-consecutive-day period where the daily maximum temperature (Tmax) at a location is ≥90th percentile for the date. Using this, one can compute the number of heatwave days… https://t.co/58vXFf5Yu9 pic.twitter.com/RYBAlTlEYe

— Chris Martz (@ChrisMartzWX) July 21, 2024