in october 1984, a large rain system held its ground over howe sound and the fraser valley regions, leading to unprecedented rains on alpine snowpacks in the area of the pemberton valley. waters backed up from lillooet lake to the village of pemberton overnight. north of that, the valley was flooded for upstream past pemberton meadows, caused by the dual "dams" created by the causeways used to cross the valley between pemberton and mount currie, with the deepest waters reaching 10 feet above normal. 100 families were evacuated.