With tens of thousands already displaced, both countries set up shelters in anticipation of further downpours.
Dozens of homes in six villages of Bulambuli district in eastern Uganda submerged in landsides triggered by heavy rains.
Record snowfall in and around Seoul creates travel headache, with flights and ferries cancelled.
Seoul is blanketed in snow, the bad weather snarling traffic, knocking out power and grounding hundreds of flights.