In addition to the low temperatures, the wind whipped at anywhere from 30 to 50 miles per hour. The foggy night was punctuated with lightning as well. But when the sun came out in the morning, Edelson said, the temperature jumped to 80. 'I went from shivering in my tent to sweating.' Above, Fuego, one of Guatemala's most active volcanoes that has been erupting since at least Spanish era in the country in the 1520s