Our hearts go out to everyone affected by the glacial outburst flood in Juneau, AK this weekend. The Mendenhall River reached a record 15 feet late Saturday and early Sunday. The flood destroyed two buildings and obstructed several roads. Glacial outburst floods are relatively new phenomena in Juneau. Since the first recorded event in 2011, the community has experienced at least one a year. The floods occur when water builds up behind the nearby Mendenhall Glacier and releases all at once (see v