the.com/sweltering

the day air turns to soup and your shirt becomes a regret you wear

means So oppressively hot and humid that you feel uncomfortably overheated, often to the point of sweating.

from From the Old English 'sweltan,' meaning to die or perish — the same dark root that gives us 'swelter.' To swelter once meant to faint or languish from heat, as if the warmth itself were doing you in. The frequentative form 'sweltering' keeps that sense of slow, ongoing oppression, and it's a distant cousin of 'sultry,' which traveled a parallel path from the same heat-soaked family of words.

old root
From 'swelter,' once meaning to faint or die
body limit
35°C wet-bulb heat can kill within hours
slang twin
'Dog days' named after star Sirius rising
heat illusion
Humidity makes you feel hotter than the thermometer
for instance

death valley — 134°f (56.7°c) recorded in july 1913, hottest reliably recorded temperature on earth

kuwait city summer — 54°c (129°f) reached in july 2016, among highest sustained temperatures in inhabited cities

phoenix arizona — 143 days over 100°f in 2023, longest heat wave on record for the city

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