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As climate change makes the world hotter, some cities have appointed "Chief Heat Officers" to try to improve their response to record-breaking temperatures. Graihagh Jackson speaks to two women who have done the job in Freetown, Sierra Leone, and Monterrey, Mexico. What does their role involve? What solutions are out there? And do they get enough funding?

Plus, Umaru Fofana reports from Freetown on the extreme heat gripping the city. Umaru talks to locals forced to sleep outside because of the temperature, despite risks to their health and safety. And he also investigates a new piece of building design that might help people living in informal settlements.

Presenter: Graihagh Jackson
Reporter in Sierra Leone: Umaru Fofana
Producer: Osman Iqbal
Researcher: Octavia Woodward
Editor: Simon Watts
Sound Engineers: James Beard and Tom Brignell