In 1816, came the Year Without Summer. Cold temperatures wreaked havoc throughout the Northern Hemisphere all through the year 1816. They say that it was all caused by the explosion of Mount Tambora, a volcano on the island of Sumbwa, Indonesia. This particular eruption was in 1815, and was the biggest and most deadly eruption ever recorded in history. More than 71,000 people died, and it could be heard in Sumatra, an island more than 12,000 miles away. Volcanic ashed fell all over the Northern Hemisphere, changing the weather.