GENEVA — Soaring temperatures in July have had detrimental effects on the well-being of hundreds of millions of people worldwide who have found the monthlong extreme heat too hot to handle, according to the World Meteorological Organization. “The extreme heat, which continued throughout July after a hot June … has had really, really devastating impacts on communities, on people’s health, on ecosystems, also on economies,” WMO spokesperson Clare Nullis told journalists Tuesday in Geneva. “Extreme heat has a domino effect across society,” she said, noting that the world’s hottest day on recent record was registered on July 22. “All of this is really yet another unwelcome indication, one of many, of the extent that greenhouse gases from human activities are, in fact, changing our climate.” WMO data show widespread, intense and…