If Harriet did not carry them to higher ground they would surely drown.

He almost lost his mouthpiece, and without it he'd surely drown.

That would be horrible - they would surely drown!

He would do nothing that might risk falling into the dark water where he would surely drown.

Vignir explained to Oddr that, had they landed sooner, the crew would have surely drowned.

We are far down; you would surely drown.

Another minute and Willie would surely drown, if he hadn't done so already.

Someone had to be in control in these wild waters, or they would surely drown.

She could not let her go further into the water--she would surely drown.