Heatwave solutions can often be simple - planting enough trees in extremely exposed and hot areas or using design choices to reduce heat gain and increase heat loss in buildings.
Sometimes simple surveillance solutions such as moving patients from a baking top floor to a lower floor of a non-airconditioned hospital can protect lives, as a study in Ahmedabad found. Having worker protections in place to stop or slow work if it is too hot can help so people don't feel the need to keep working at high intensity when it's not safe, says Mr Parsons.