For outdoor work, protection from extreme heat generally implies shade, hydration, frequent breaks, et cetera.
Most remotely modern interior spaces in Florida are going to be air conditioned so this is already not a problem in Florida.
According to the article, the 30C threshold is for "more demanding jobs in sectors like agriculture and construction", which generally take place outdoors
Cos today in my pokey town, my house is 30°C, my local library 28°C the gym is at least 25°C and the outside 31°C at a dew point of 15°C. Its not Florida but its the UK and there’s no relief.
For office work, a lot of European countries (especially the UK) haven't invested in AC as much as the rest of the world because they haven't needed to. This is especially apparent in housing, where working from home is becoming difficult in these higher temperatures.
Days could be brutally hot ( easily over 100 F ), but there was little humidity. My transportation was a motorcycle ( with additional heat radiating off the engine ), so mid often feel a little uncomfortable, but it was definitely livable.
Interestingly, homeowners often used evaporative ‘swamp coolers’ instead of AC. A big benefit of low humidity.
Natural adaptation.