Millions of people around the world have been living under heat advisories due to record hot temperatures. The exceptional heat is being felt across Europe, the US, North Africa, the Middle East and Asia. Host James Reynolds hears from three farmers in South Africa, Nigeria and the UK about how they are having to adapt their work and methods due to the extreme conditions. We hear from three doctors in India, France and Australia about the warning signs of heatstroke and the cases they are having to treat due to exposure to the sun.