It's so hot at the Grand Canyon, your shoes may melt!

It's so hot at the Grand Canyon National Park in Arizona that officials of the National Park Service have warned that it could melt your shoes! The National Weather Service has issued a excessive heat warning for the region, where temperatures could reach up to 45°C. Authorities have suggested that travelers avoid hiking between peak sun hours, from 10 am to 4 pm. Much of the west of the region is under a heat advisory for the week.