Tidal wave

The last tidal wave here killed twenty and left thousands homeless.

During the day conditions worsened quickly—for example, a 2-6-0 on the Uckfield line suddenly encountered flood water high enough to enter its ashpan and extinguish its fire—until lock gates up-river at Barcombe gave way and a tidal wave rolled down the valley meeting head-on a spring tide rolling up from the coast.

As the doors opened, a tidal wave of people flooded into the room.

I was overcome by a tidal wave of emotions.

But this is no stream, folks. This will be a tidal wave that can swamp our democracy.