The spring of 1816 was overall cooler and drier than normal. Then the summer had three extreme cold spells in June, July, and August. People started to talk about the real possibility of a famine. Within weeks, New England temperatures were really unseasonably hot again.
The 2015 episode covers a volcano eruption in Sumbawa, Indonesia in 1816, that combined with several other factors to create an unusual -- and catastrophic -- series of weather events.
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