Deforestation has killed more than half a million people in the tropics over the past two decades as a result of heat-related illness, a study has found.

Land clearance is raising the temperature in the rainforests of the Amazon, Congo and south-east Asia because it reduces shade, diminishes rainfall and increases the risk of fire, the authors of the paper found.

Deforestation is responsible for more than a third of the warming experienced by people living in the affected regions, which is on top of the effect of global climate disruption.