<p>Parts of India have been facing extreme heat - with temperatures soaring past 46 degrees Celsius. But a less familiar story unfolds after dark. When temperatures stay high after sunset, an essential human need is threatened: sleep.</p><p>Scientific research suggests that hot nights are leading many of us around the world to lose shut-eye already. Our bodies need to cool down to fall asleep – but hotter nights make that much harder. And the impacts go way beyond just feeling tired; disrupted sleep has links to poor cardiovascular health and depression. Women, children, the elderly and those living in hot countries with less income are most affected. </p><p>As global temperatures rise due to climate change, experts warn that the impact on our sleep – and our health – will only worsen. </p><p>Presenter Graihagh Jackson speaks to sleep expert Dr Sophie Bostock and BBC Marathi reporter, Janhavee Moole. They explore how rising temperatures are disrupting sleep in India and beyond – and share practical tips on how to stay cool in a warming world.</p><p>Producer: Graihagh Jackson, Janhavee Moole and Grace Braddock Sound engineer: Ben Andrews and Tom Brignell Editor: Simon Watts</p>