A log bumped against the hull of a sailboat anchored for the night below Humboldt Bay. Dawn arrived thick with clouds, a few shades lighter than night. The mountains disappeared in the mist. A few miles off the coast, a squall, like a piece of churning night, darkened the sky and was fast approaching. For now, though, the waves were placid, so the thud of the log wasn’t loud enough to wake the boat’s lone sleeping inhabitant, but it was loud enough to penetrate his dreams. Logan Blackburn turned over restlessly in the cabin berth, his brow furrowed, caught in a recurring nightmare of a different storm two years ago. “It won’t hold!” he shouted to his father. “It’s too late! Stop!” The rain came down in sheets, pelting Logan so hard he could barely see. He stood at the edge of a manmade