word | | Natural hazards |
| Aoba | Vanuatu | tropical cyclones or typhoons (January to April); volcanic eruption on Aoba (Ambae) island began 27 November 2005, volcanism also causes minor earthquakes; tsunamis |
| approach | South Georgia and the South Sandwich Islands | the South Sandwich Islands have prevailing weather conditions that generally make them difficult to approach by ship; they are also subject to active volcanism |
| April | Bolivia | flooding in the northeast (March-April) |
| April | Cocos (Keeling) Islands | cyclone season is October to April |
| April | Comoros | cyclones possible during rainy season (December to April); Le Kartala on Grand Comore is an active volcano |
| April | 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 ... |
| April | Mauritania | hot, dry, dust/sand-laden sirocco wind blows primarily in March and April; periodic droughts |
| April | Mauritius | cyclones (November to April); almost completely surrounded by reefs that may pose maritime hazards |
| April | Tonga | cyclones (October to April); earthquakes and volcanic activity on Fonuafo'ou |
| April | Vanuatu | tropical cyclones or typhoons (January to April); volcanic eruption on Aoba (Ambae) island began 27 November 2005, volcanism also causes minor earthquakes; tsunamis |
| April | Zambia | periodic drought, tropical storms (November to April) |
| arc | Turkey | severe earthquakes, especially in northern Turkey, along an arc extending from the Sea of Marmara to Lake Van |
| Arctic | Canada | ... form east of the Rocky Mountains, a result of the mixing of air masses from the Arctic, Pacific, and North American interior, and produce most of the country's rain and snow ... |
| Argentine | Uruguay | ... high winds (the pampero is a chilly and occasional violent wind that blows north from the Argentine pampas), droughts, floods; because of the absence of mountains, which act as weather barriers, all ... |
| Asia | Pacific Ocean | ... to as the "Pacific Ring of Fire"; subject to tropical cyclones (typhoons) in southeast and east Asia from May to December (most frequent from July to October); tropical cyclones (hurricanes) may form ... |
| astride | Philippines | astride typhoon belt, usually affected by 15 and struck by five to six cyclonic storms per year; landslides; active volcanoes; destructive earthquakes; tsunamis |
| Atlantic | Atlantic Ocean | icebergs common in Davis Strait, Denmark Strait, and the northwestern Atlantic Ocean from February to August and have been spotted as far south as Bermuda and the Madeira Islands; ships subject to ... |
| Atlantic | Costa Rica | occasional earthquakes, hurricanes along Atlantic coast; frequent flooding of lowlands at onset of rainy season and landslides; active volcanoes |
| Atlantic | 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 ... |
| Atolls | United States Pacific Island Wildlife Refuges | ... a maritime hazard Kingman Reef: wet or awash most of the time, maximum elevation of less than 2 m makes Kingman Reef a maritime hazard Midway Islands, Johnston, and Palmyra Atolls: NA |
| August | Atlantic Ocean | icebergs common in Davis Strait, Denmark Strait, and the northwestern Atlantic Ocean from February to August and have been spotted as far south as Bermuda and the Madeira Islands; ships subject to ... |
| August | Botswana | periodic droughts; seasonal August winds blow from the west, carrying sand and dust across the country, which can obscure visibility |
| August | 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 |
| August | Kuwait | ... 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 and August |
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