The word "tidal" refers to something that is related to or affected by tides, which are the daily rise and fall of the ocean's surface caused by gravitational forces. Full definition
In this four year period, there were several nasty bear market rallies, lifting the hopes of the hopeful, only to be met with tidal waves of selling. (theirrelevantinvestor.com)
The small sandy beach offers safe swimming in tidal pools for the little ones, while the deeper waters provide big waves for the surfers. (travelground.com)
Many entrepreneurs can attest to this; once ideas start flowing, they usually come in tidal waves. (voltaeffect.com)