From Kim Stanley Robinson’s great book The Ministry for the Future:
“a wet-bulb temperature of 35 [95 degrees Fahrenheit] will kill humans, even if unclothed and sitting in the shade; the combination of heat and humidity prevents sweating from dissipating heat, and death by hyperthermia soon results.”
The south Texas borderlands will once again be perilously close to a wet bulb temperature of 95 degrees Fahrenheit tomorrow afternoon. It’ll be 92 in Laredo and McAllen. This will take a severe toll on the area’s migrant population.
This map comes from the National Weather Service.