In places like Saudi Arabia, temperatures of over 40 degrees are nothing unusual, but when such a heat hit Russia in 2010, it claimed an estimated 56,000 lives. The heat wave in Europe in 2003 even killed 70,000 people. Using exceptional footage and exciting insights from experts such as Friederike Otto, Director of the Environmental Change Institute at Oxford University, we will examine two of the most burning heatwaves in recent history and find out why this force of nature is claiming so many lives.