As promised, here is the source for Takkakaw falls. In winter, the waterfall is frozen solid
In late spring, as the warming temperatures melt snowfall on the high peaks above the Yoho Valley, the icicles break off and crash to the valley floor.
As summer wears on, climbing temperatures and the blazing sun melt the top layers of the Wapta Icefield's glaciers which directly feed the falls.
Deep into the fall, the waterfall slows to a mere whisper of it's late-summer self, and during the below-freezing nights, large columns of ice form on the cliffs. But subjected to the warmth of the autumn sun, these columns break off the cliffs and thunder down to the rocks at the base of the falls, providing a spectacular daily show for fall visitors.