I just read a Danish article, that stated that the walls of a 15 square kilometer ice-melt lake have collapsed, causing billions of liters of freshwater to rush into the sea, causing the death of an untold amount of fish, due to decompression sickness, as they were forced to quickly flee to the surface of the fjord, causing their immediate death. I can't seem to find anything about this calamity in English yet, but here's a translated page about this terrible incident;

http://translate.google.com/translate?hl=en&sl=da&u=http://www.dr.dk/Nyheder/Indland/2009/09/12/141735.htm&ei=RdSsSsOeLYXt-Abb-Jy9Bg&sa=X&oi=translate&resnum=1&ct=result&prev=/search%3Fq%3Dhttp://www.dr.dk/Nyheder/Indland/2009/09/12/141735.htm%26hl%3Den%26sa%3DG

Thanks TN.