Authorities in Hawaii pleaded with relatives of those missing after the deadliest U.S. wildfire in more than a century to come forward and give DNA samples, saying the low number provided so far threatens to hinder efforts to identify any remains discovered in the ashes.

The unprecedented Northwest U.S. heat wave that slammed Seattle and Portland, Ore., moved inland Tuesday — prompting a electrical utility in Spokane, Wash., to warn that people will face more rolling blackouts amid heavy power demand.