See raudal, waterfall.
They are two words that refer to water jumps or a lot of equal or similar elements. It can also mean, events that occur at the same time or in track.
RAUDALES CASCADAS synonymous terms when CASCADA is used figuratively. See RAUDAL, large stream of water. The adverbial locutions A RAUDALES and IN CASCADA are used to designate copious quantities and in sequence or repeatedly, respectively.