> One 2015 study concluded extremes are likely to approach and exceed 35C in the region around the Arabian Gulf towards the end of the century if greenhouse gas emissions are not reined in, posing questions for human habitability there.
> In 2020, research found that some coastal subtropical locations have already experienced WBTs of 35C, albeit only for a few hours.
> “Previous studies projected that this would happen several decades from now, but this shows it’s happening right now,” said lead author Colin Raymond, a climate scientist at Nasa’s Jet Propulsion Laboratory. “The times these events last will increase and the areas they affect will grow in direct correlation with global warming.”
> The study also found that globally, the number of times that a WBT of 30C was reached – still considered an extreme humidity and heat event – more than doubled between 1979 and 2017. There were about 1,000 occurrences of a 31C WBT, and about a dozen above 35C, in Pakistan, India, Saudi Arabia, Mexico and Australia.
not evidence of something that would kill hundred of millions of humans.
But, more importantly,
The oft-cited 35C value comes from a 2010 theoretical study.
Simply put: nobody knows the real threshold and nobody put it to test.
I'm no denier in any way, but doom prophecies are usually wrong, they are used to scare people into action, but are based on the idea that nothing changes.
For example, planting trees is effective against heat waves, it's cheap and it's being done extensively, everywhere you look
China will aim to plant and conserve 70 billion trees by 2030 as part of the global tree movement
The 35C value is suggested as an upper limit. Lower WBTs have already been shown to be deadly amongst the more vulnerable.
I agree about tree planting being a sensible precaution to take - preventing sun from reflecting off tarmac and concrete is going to help at least a bit as well as the other benefits.
Have you got evidence of climate change causing those kinds of wet bulb temperatures in large populated areas?