Sudan
dust storms and periodic persistent droughts

Suriname
NA

Svalbard
ice floes often block the entrance to Bellsund (a transit
point for coal export) on the west coast and occasionally make parts
of the northeastern coast inaccessible to maritime traffic

Swaziland
drought

Sweden
ice floes in the surrounding waters, especially in the Gulf
of Bothnia, can interfere with maritime traffic

Switzerland
avalanches, landslides, flash floods

Syria
dust storms, sandstorms

Taiwan
earthquakes and typhoons

Tajikistan
earthquakes and floods

Tanzania
flooding on the central plateau during the rainy season;
drought