flood waves at big walls in the river, white wave

water river rapid snow winter freezing wave stream ice waterfall sea waterway watercourse shore rock frost geyser flood waves big walls standing wild storm wide urban riverbed muddy white splashing tall concrete wall huge created fast former hurricane caused days heavy rain lethal speed city disaster catastrophe climate change environment desaster disastrous natural hazard human instigated disasters anthropogenic manmade flooded flash accidents power land flowing freshwater rivers flow moving supply wall rain