word | | Natural hazards |
| result | Canada | ... north is a serious obstacle to development; cyclonic storms form east of the Rocky Mountains, a result of the mixing of air masses from the Arctic, Pacific, and North American interior, and ... |
| resulting | Thailand | land subsidence in Bangkok area resulting from the depletion of the water table; droughts |
| resumed | Jan Mayen | dominated by the volcano Haakon VII Toppen/Beerenberg; volcanic activity resumed in 1970; the most recent eruption occurred in 1985 |
| Reunion | France | metropolitan France: flooding; avalanches; midwinter windstorms; drought; forest fires in south near the Mediterranean overseas departments: hurricanes (cyclones), flooding, volcanic activity (Guadeloupe, Martinique, Reunion) |
| Rift | Congo, Democratic Republic of the | periodic droughts in south; Congo River floods (seasonal); in the east, in the Great Rift Valley, there are active volcanoes |
| Rift | Ethiopia | geologically active Great Rift Valley susceptible to earthquakes, volcanic eruptions; frequent droughts |
| Ring | Pacific Ocean | ... surrounded by a zone of violent volcanic and earthquake activity sometimes referred to as the "Pacific Ring of Fire"; subject to tropical cyclones (typhoons) in southeast and east Asia from May to ... |
| Ring | Papua New Guinea | active volcanism; situated along the Pacific "Ring of Fire"; the country is subject to frequent and sometimes severe earthquakes; mud slides; tsunamis |
| rise | Maldives | low level of islands makes them sensitive to sea level rise |
| risks | Italy | regional risks include landslides, mudflows, avalanches, earthquakes, volcanic eruptions, flooding; land subsidence in Venice |
| risks | Macedonia | high seismic risks |
| River | Congo, Democratic Republic of the | periodic droughts in south; Congo River floods (seasonal); in the east, in the Great Rift Valley, there are active volcanoes |
| River | Mali | hot, dust-laden harmattan haze common during dry seasons; recurring droughts; occasional Niger River flooding |
| River | Vietnam | occasional typhoons (May to January) with extensive flooding, especially in the Mekong River delta |
| rivers | Belgium | flooding is a threat along rivers and in areas of reclaimed coastal land, protected from the sea by concrete dikes |
| roads | Kuwait | sudden cloudbursts are common from October to April and bring heavy rain, which can damage roads and houses; sandstorms and dust storms occur throughout the year but are most common between March ... |
| rockslides | Norway | rockslides, avalanches |
| rockslides | Venezuela | subject to floods, rockslides, mudslides; periodic droughts |
| Rocky | Canada | ... continuous permafrost in north is a serious obstacle to development; cyclonic storms form east of the Rocky Mountains, a result of the mixing of air masses from the Arctic, Pacific, and North ... |
| routinely | Bangladesh | droughts, cyclones; much of the country routinely inundated during the summer monsoon season |
| Russia | Russia | ... a major impediment to development; volcanic activity in the Kuril Islands; volcanoes and earthquakes on the Kamchatka Peninsula; spring floods and summer/autumn forest fires throughout Siberia and parts of European Russia |
| Saba | Netherlands Antilles | Sint Maarten, Saba, and Sint Eustatius are subject to hurricanes from July to October; Curacao and Bonaire are south of Caribbean hurricane belt and are rarely threatened |
| Sahara | Liberia | dust-laden harmattan winds blow from the Sahara (December to March) |
| Sahara | Sierra Leone | dry, sand-laden harmattan winds blow from the Sahara (December to February); sandstorms, dust storms |
| Saint | French Southern and Antarctic Lands | Ile Amsterdam and Ile Saint-Paul are inactive volcanoes; Iles Eparses subject to periodic cyclones; Bassas da India is a maritime hazard since it is under water for a period of three ... |
| Saint | Saint Vincent and the Grenadines | hurricanes; Soufriere volcano on the island of Saint Vincent is a constant threat |
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