“Extreme heat is the most common cause of weather-related hospitalisations in Australia, and kills more people than all other natural hazards combined. What does exposure to extreme heat – such as a temperature of 49C – do to the body?”
It’s 42c outside, (low humidity, 11%) could be worse. #BlackSaturday was 46c. So what happens if you’re not hydrating while moving about? By chance I got to measure what happens. I had a blood test about 10 years ago, the GP mentioned fasting so I skipped water as well 🤪
Rule #38
Went out did a 10km walk, mid morning in summer, had some blood taken but they couldn’t draw any. I had to re-hydrate about 1 - 2 litres before trying again. Even then the sample hydrolysed as I didn’t have enough fluid in me. Your blood thickens, your heart has to physically pump harder. That’s the feeling when you’re dehydrated and exerting.
At 46c + this is lethal. Switch tasks to cooler periods out of the sun.
Then there was that day I had to run in 44c+ late afternoon. Don’t do that. ☀️🔥🥵


