Science writer and Rolling Stone contributing editor Jeff Goodell says the threat of climate change is greatest from rising ocean waters. But the rate of the encroaching tides isn’t fast enough for our human brains to wrap themselves around as a threat that needs to be dealt with urgently. He’s delivering a Portland lecture Wednesday night to share what he learned in writing his acclaimed 2017 book, “The Water Will Come” and what can be done to head off environmental catastrophe.