“There are more than a billion people living in extreme poverty, with many of them living in megacities and large urban centres. These are people struggling to survive,” said Simon Michael Papalexiou, … [UCI] environmental engineer and the lead author of the study. … Amir AghaKouchak, a civil engineer and co-author of the study, said growing urban heat risk will require city authorities to think about new measures save lives - something some are already putting in place.