Ukraine
NA
United Arab Emirates
frequent sand and dust storms
United Kingdom
winter windstorms; floods
United States
tsunamis, volcanoes, and earthquake activity around
Pacific Basin; hurricanes along the Atlantic and Gulf of Mexico
coasts; tornadoes in the midwest and southeast; mud slides in
California; forest fires in the west; flooding; permafrost in
northern Alaska, a major impediment to development
Uruguay
seasonally high winds (the pampero is a chilly and
occasional violent wind which blows north from the Argentine
pampas), droughts, floods; because of the absence of mountains,
which act as weather barriers, all locations are particularly
vulnerable to rapid changes from weather fronts
Uzbekistan
NA
Vanuatu
tropical cyclones or typhoons (January to April); volcanism
causes minor earthquakes; tsunamis
Venezuela
subject to floods, rockslides, mudslides; periodic droughts
Vietnam
occasional typhoons (May to January) with extensive
flooding, especially in the Mekong River delta
Virgin Islands
several hurricanes in recent years; frequent and
severe droughts and floods; occasional earthquakes