The Tsunami may have been averted by by a combination of abilities.
Speculation

-Paulette Hawkins Augmented Yando's Ears until they grew as big as a Rocs wings and then Yando Flapped his ears so fast that the ocean froze.
Another possibility- A power Augmenter(Paulette?),A Cryokinetic, A Microwave Emitter and a Telekinetic walk into a Bar, No, Wait, That happens afterwards.
The Augmenter Amplifies the Telekinetic, Allowing the Telekinetic to effectively Fly/Levitate the whole group far out to Sea(They might have used a boat to get closer). Once there the Telekinetic simply needs to hold them in place.
Once there, The Augmenter amplifies the Microwave Emitter, Who then vaporizes Millions of gallons of sea water while the Cryokinetic cools the air surrounding the group in order to prevent them from being steamed like crabs.
After a large volume of Sea water has been vaporized, Breaking the force of the tsunami, The Augmenter then amplifies the Cryokinetic who proceeds to Cool the superheated Air/Water/Steam for miles around.
Afterward, All four go to the Bar on the Beach and get real relaxed; Nine months later, Baby D.L. is born. I'll bet' Ya he was a cute Lil' Tyke.