Swiss glaciers are shedding fast-protecting snow as Europe bakes in a heatwave. That threatens bigger ice loss later. Sources tell the story. In the US, experts say the current hot spell would not occur without climate change. Homes in New Zealand still struggle against extreme heat. Take Berlin - older flats there stay hot without air conditioning. Locals step up on food shocks. Governments trail in response. These signs show heat danger growing and preparedness falling short everywhere.