"The passion that awoke in him that day, when he saw her at the gate, swept along like an avalanche, or like a prairie fire, or like anything that drives headlong over all obstacles...."
See in text (Désirée's Baby)
Chopin compares Armand’s passion to avalanches, fires, or anything else that moves quickly and without regard for objects in its way. This characterizes Armand as potentially capricious, rash, and reckless. If such passion can make him feel this way and suddenly change his behavior, then other emotions can just as quickly change his behavior in different ways.