For many, summer means spending more time outdoors – but is it still safe to go hiking during a heatwave? We spoke to experts to find out…Is there clear guidance on when it might be too hot to go on a hike? What are the potential health dangers of going on a hike in a heatwave? “Exercise produces additional body heat, while high temperatures and humidity make it harder for the body to lose that heat. Alternatively, if you are going on a longer hike, then you could pack big water containers or lots of smaller water bottles.”