Typhoon Louise did do a lot of damage in October 1945. Buried on my shelf somewhere is a old 1980s magazine article, describing the dumps ashore flooded, aircraft wrecked, ships beached or sunk. The author speculated the short term effect on DOWNFALL operations would have been noticeable. Okinawa was not the only base site for DOWNFALL. Luzon had the port of Manilia which was becoming the new logistics hub for the western Pacific operations. Residual logistics sites across the central Pacific were still in use as their material was drawn down. The severe damage on Okinawa would have slowed the campaign/s but made only a temporary halt for a few weeks.