There is no point sugar-coating a death pill.
To understand the TLA article linked below, it is important to be aware of what is “wet-bulb temperature”. Either do your own research on that or read this – “Wet-bulb temperature”. All the facts you need to form a reasonable knowledge basis to follow the article below is contained in the introductory remarks and the ‘Intuition’ section of that Wikipedia page.
“Potentially Fatal Combinations of Humidity and Heat Are Emerging Across the Globe” – Kevin Krajick via the Titanic Lifeboat Academy