I don't see humidity mentioned in the article, that's the real killer once the temperature gets up above body temperature. If humidity is high then evaporating water isn't going to effectively cool a person and the only way to survive is to get into air conditioning or other artificially low-temperature safe zones. Temperatures like this are more often seen in arid places, I dread the time something like this hits a major tropical urban area when it's humid. We could see megadeaths.