Storms are dangerous.
Long ago, people thought that they were the work of gods in the sky. The ancient Greeks believed in a storm god called Typhon, who unleashed terrible monsters to wreck ships and drown sailors. In Germany and Scandinavia, people used to believe that storms were caused by the ghosts of dead warriors, riding across the sky in a battle of rage. One Scandinavian god was called Thor. He was the god of thunder, and it was the noise of his hammering that was heard on the earth below.