00:01London's heatwaves could cost more than £25 billion over the next decade, the Mayor has warned.
00:07City Hall estimates heatwaves in 2026 alone cost £2.5 billion in lost productivity.
00:15Sadiq Khan took that warning to the COP31 climate summit in Antalya,
00:19where he called on global leaders to invest in protecting cities from extreme heat.
00:24He says the cost of acting is outweighed by the economic damage of doing nothing.
00:31In London, heat ready plan includes tackling overheated homes and protecting people most at risk.
00:38But observers say who will pay for home retrofits in London remains unclear.
