Three people are missing in Australia amid the nation's worst heatwave in years, with temperatures in several states set to climb above 40°C. Evacuations are underway and catastrophic fire danger ratings are in place across Victoria, which remains under a total fire ban. The current threat is expected to intensify with strong winds and thunderstorms forecast to worsen the danger. Mark Howden, director of the Institute for Climate, Energy and Disaster Solutions at Australian National University,