word | | Natural hazards |
| August | Northern Mariana Islands | active volcanoes on Pagan and Agrihan; typhoons (especially August to November) |
| August | Pacific Ocean | ... south of Mexico and strike Central America and Mexico from June to October (most common in August and September); cyclical El Nino/La Nina phenomenon occurs in the equatorial Pacific, influencing weather ... |
| August | Pakistan | frequent earthquakes, occasionally severe especially in north and west; flooding along the Indus after heavy rains (July and August) |
| autumn | 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 |
| avalanches | Andorra | avalanches |
| avalanches | Austria | landslides; avalanches; earthquakes |
| avalanches | European Union | flooding along coasts; avalanches in mountainous area; earthquakes in the south; volcanic eruptions in Italy; periodic droughts in Spain; ice floes in the Baltic |
| avalanches | 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) |
| avalanches | Italy | regional risks include landslides, mudflows, avalanches, earthquakes, volcanic eruptions, flooding; land subsidence in Venice |
| avalanches | Norway | rockslides, avalanches |
| avalanches | Switzerland | avalanches, landslides, flash floods |
| averages | Cuba | the east coast is subject to hurricanes from August to November (in general, the country averages about one hurricane every other year); droughts are common |
| awash | United States Pacific Island Wildlife Refuges | ... the narrow fringing reef surrounding the island can be a maritime hazard Kingman Reef: wet or awash most of the time, maximum elevation of less than 2 m makes Kingman Reef a ... |
| away | Arctic Ocean | ice islands occasionally break away from northern Ellesmere Island; icebergs calved from glaciers in western Greenland and extreme northeastern Canada; permafrost in islands; virtually ice locked from October to June; ships subject ... |
| Azores | Portugal | Azores subject to severe earthquakes |
| Baker | United States Pacific Island Wildlife Refuges | Baker, Howland, and Jarvis Islands: the narrow fringing reef surrounding the island can be a maritime hazard Kingman Reef: wet or awash most of the time, maximum elevation of less than 2 ... |
| Baltic | European Union | flooding along coasts; avalanches in mountainous area; earthquakes in the south; volcanic eruptions in Italy; periodic droughts in Spain; ice floes in the Baltic |
| Bangkok | Thailand | land subsidence in Bangkok area resulting from the depletion of the water table; droughts |
| barriers | Uruguay | ... wind that 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 |
| Basin | 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 ... |
| Bassas | 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 ... |
| Beerenberg | Jan Mayen | dominated by the volcano Haakon VII Toppen/Beerenberg; volcanic activity resumed in 1970; the most recent eruption occurred in 1985 |
| began | Vanuatu | tropical cyclones or typhoons (January to April); volcanic eruption on Aoba (Ambae) island began 27 November 2005, volcanism also causes minor earthquakes; tsunamis |
| Bellsund | 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 |
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