WHITEHORSE -- Unseasonable heat and rapidly melting snowpacks in Yukon have combined to produce unprecedented flooding far worse the last major flood event, and emergency officials say it could be weeks before conditions improve. The territory has offered an update on the high water that has affected about 200 properties in the Southern Lakes Region south of Whitehorse and the Lake Laberge area to the north. Mila Milojevic with Yukon Energy, the territory's primary electricity producer, says water levels are dropping at the dam at Marsh Lake used to manage downriver flows, but modelling suggests levels by August will still be 20 to 80 centimetres above the record floods of 2007.