At the same time, Hurricane Humberto, which briefly exploded into a rare Category 5 storm with 160 mph winds Saturday, is now a Category 4 hurricane. Tropical storm warnings remain in effect for parts of the islands, with 4 to 8 inches of rain expected to trigger flash flooding. Imelda’s slower than expected northward movement means Humberto will win a tropical tug-of-war and pull Imelda away from the shoreline. The Bermuda Weather Service has issued a tropical storm watch for the archipelago. On the heels of Humberto, Imelda could track even closer to Bermuda, with potential for a direct landfall Wednesday into Thursday.