At least 20 people including a number of children have been killed in flash floods in six districts and the capital of Afghanistan's southern Kandahar province, the UN said late Saturday.
The north-east Australian city of Townsville could face tornadoes, just as it is being hit by devastating floods, authorities said Sunday.
Once-in-a-century flooding in part of the eastern Australian state of Queensland looks set to worsen as the nation's weather bureau on Saturday warned of more heavy rain in the area.
Trump's trip to the state follows criticism for his handling of Hurricane Maria, which devastated Puerto Rico last year.
Florence slowly crawled over South and North Carolina, dumping heavy rains on already flood-swollen river basins that authorities warned could bring more death and destruction.