US on watch as impending Tropical Storm Imelda threatens south-east

Weather system expected to become tropical storm as Hurricane Humberto weakens but still remains category 4A weather system that is forecast to become Tropical Storm Imelda later on Sunday before approaching the coast of South Carolina as a hurricane in the coming days was causing disruption in the Bahamas and nearby islands.Meanwhile, Hurricane Humberto weakened very slightly but remained a strong category 4 storm in the Atlantic, threatening Bermuda.