this already happens in parts of the globe (India for one)
I don't think this is true. I've seen a similar paper like the one I linked, which claims that by the end of the century it will be the case in the Indus- and Ganges-region, and the same is said about the North China Plain, but I've never seen that, at the moment, those conditions exist. On the contrary: here' s a paper which claims that since a couple of years, the first emergence of them is measured for very, very short amounts of time.
it still takes hours to actually kill so mostly mainly the old die from it thus far
What the papers which I'm talking about say, is that there is a maximum capacity of heat and humidity which any person can take, that's a temperature of 35°C (identical to the temperature of your skin) and 100% humidity (or the equivalent: a slightly higher temperature, and a slightly lower humidity). Any person dies after 6 hours in those conditions, no matter how fit they are. The Persian Gulf and the most important agricultural regions of both India and China (combined population: around one billion people) will experience those conditions by the end of the century.
Obviously, it's possible that old people, sick people and infants have already died from heat, but they can experience that in much less destrimental conditions. This happens in every severe heat wave. There's a qualitative difference with these "regular" deaths from heat, because I'm talking about a situation in which everyone dies.
Your body has exactly one way of cooling down naturally: evaporative cooling (state change is as an aside still the main way we cool down stuff technologically). If there is too much humidity, your sweat can’t evaporate anymore.
Since you're talking about the correct proces in the papers which I linked to, there are 2 possibilities: (1) you're mixing up two different phenomena (2) it's all happening faster than expected, like we often see with climate change, and in that case I'm very interested in your source.
I don't think this is true. I've seen a similar paper like the one I linked, which claims that by the end of the century it will be the case in the Indus- and Ganges-region, and the same is said about the North China Plain, but I've never seen that, at the moment, those conditions exist. On the contrary: here' s a paper which claims that since a couple of years, the first emergence of them is measured for very, very short amounts of time.
What the papers which I'm talking about say, is that there is a maximum capacity of heat and humidity which any person can take, that's a temperature of 35°C (identical to the temperature of your skin) and 100% humidity (or the equivalent: a slightly higher temperature, and a slightly lower humidity). Any person dies after 6 hours in those conditions, no matter how fit they are. The Persian Gulf and the most important agricultural regions of both India and China (combined population: around one billion people) will experience those conditions by the end of the century.
Obviously, it's possible that old people, sick people and infants have already died from heat, but they can experience that in much less destrimental conditions. This happens in every severe heat wave. There's a qualitative difference with these "regular" deaths from heat, because I'm talking about a situation in which everyone dies.
Since you're talking about the correct proces in the papers which I linked to, there are 2 possibilities: (1) you're mixing up two different phenomena (2) it's all happening faster than expected, like we often see with climate change, and in that case I'm very interested in your source.
Pakistan - Jacobabad - at least was confirmed to have exceeded the wet-bulb temperature at least four times, in 1987 then 2005, 2010 and 2012. Each time for a few hours; it has been recorded staying near 34C wet bulb for days at a time though.
I don't remember where I read this occurred for India mind you.