Listen to the vernacular of this weather report from Las Vegas, a desert. The report claims a man got 3rd DEGREE BURNS from sitting on a bus bench. LMFAO!!
This just after Las Vegas just broke a 60 year old record for the most days under triple digits:
291 Days in a row
This describes a third degree burn, not the heat it takes to make one.
Here's a chart of what it takes to be burned to various degrees.
https://www.antiscald.com/index.php?route=information/information&information_id=15
10 MINUTES AT 49 CELSIUS/120 F.
Here's the daily temps in Las Vegas this July. If it's like Phoenix, and it is, the temp probably varies as much as 5 degrees Fahrenheit around the metro area. https://www.accuweather.com/en/us/las-vegas/89101/july-weather/329506
So far, the maximum official AIR temperature is -only- 110/120F with that range. REMEMBER 120 F can cause a 3rd degree burn--there is an activation time which means the length of exposure before the damage starts. A hot pad will cause 3rd degree burns if left on too long,, even though a quick dip in a hot tub might not. THE HOTTER THE STIMULUS THE SHORTER THE ACTIVATION TIME.
Sitting on the ground, or a metal bench is much hotter than the air and can burn a person. Here's a table of GROUND temperatures of given surfaces at given AIR temperatures.
https://site.extension.uga.edu/climate/2022/05/how-hot-does-pavement-get/
BLACKTOP 130 F at 95 F AIR TEMPERATURE. IMAGINE WHAT IT IS AT 115. And do some research instead of relying on "You're full of shit" for ideas you don't like. Florida is having a heat wave too. Perfect time for you to go out and test things.