Metro: Heat-related deaths could soar by 2080 Deaths in cities from climate change will quadruple in the next 70 years, scientists have warned. Heat-related deaths in London each summer could soar from 120 now to nearly 500 by 2080 – double previous estimates. Earlier studies ignored bigger variations in day-to-day temperatures, Simon Gosling of Reading University told scientists in Copenhagen, Denmark. More hot days put the body under more stress, with the problem worse in cities …