Residents of Guam and the Northern Marianas boarded up windows and stocked up as a monster weather system upgraded on Saturday to a "super typhoon" -- the equivalent of a category-5 hurricane -- approached the U.S. Pacific territories.

Bavi is expected to undergo rapid intensification before bringing super typhoon conditions to the U.S. Northern Mariana Islands this weekend.

Residents of Guam and the Northern Marianas prepare as a projected super typhoon approaches the U.S. Pacific islands.