After the hottest June in history and record-breaking temperatures last year, the UK is really feeling the heat. But, we’re not alone. Last week the world experienced the hottest day in history - and forecasters warn this is just a taste of what is to come.

Here on Inside Health we love a tricky question - so in the first episode of the new series we’re chasing down the answer to a pretty timely one, how hot is too hot for our health.

James heads into the lab to explore exactly what is going on inside our bodies when it gets hotter. He gets wired up and locked inside a heated chamber to find out what factors matter most, from core temperature to humidity, and learns which is more deadly, cold or heat. He also hears about a surprising tip to stay safe in the heat.

Do join us on what promises to be a rather hot and sweaty journey…

How hot is too hot for you? And what other health issues should we be covering? Do get in touch via email at inside.health@bbc.co.uk

Presenter: James Gallagher
Producer: Gerry Holt
Editor: Erika Wright
Production Coordinator: Jonathan Harris
Technical Producer: Tim Heffer

Image: James Gallagher in the lab. Credit: Dan Welsh