As climate change leads to global temperature rises, cities around the world are being faced with extreme levels of heat. This can bring whole cities to a halt, disrupt key infrastructure, and for the most vulnerable in society heat can be a killer. But where there’s a problem, innovation is never far behind. We meet the people who are trying to find solutions – from urban designers finding inspiration in ancient technologies to keep cities cool, to social projects offering simple solutions to vulnerable populations. Presenter: Myra Anubi Producer/Reporter: Lizzy McNeill Series Producer: Tom Colls Sound Mix: Annie Gardiner Editor: Penny Murphy Email: peoplefixingtheworld@bbc.co.uk Image: A hot child.