word | | Natural hazards |
| occasionally | 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 ... |
| occasionally | Armenia | occasionally severe earthquakes; droughts |
| occasionally | Pakistan | frequent earthquakes, occasionally severe especially in north and west; flooding along the Indus after heavy rains (July and August) |
| occasionally | 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 |
| occurred | Jan Mayen | dominated by the volcano Haakon VII Toppen/Beerenberg; volcanic activity resumed in 1970; the most recent eruption occurred in 1985 |
| occurrences | Japan | many dormant and some active volcanoes; about 1,500 seismic occurrences (mostly tremors) every year; tsunamis; typhoons |
| occurs | Egypt | periodic droughts; frequent earthquakes, flash floods, landslides; hot, driving windstorm called khamsin occurs in spring; dust storms, sandstorms |
| occurs | Estonia | sometimes flooding occurs in the spring |
| occurs | Pacific Ocean | ... from June to October (most common in August and September); cyclical El Nino/La Nina phenomenon occurs in the equatorial Pacific, influencing weather in the Western Hemisphere and the western Pacific; ships ... |
| ocean | Antarctica | ... high interior; frequent blizzards form near the foot of the plateau; cyclonic storms form over the ocean and move clockwise along the coast; volcanism on Deception Island and isolated areas of West ... |
| Ocean | 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 ... |
| Ocean | Djibouti | earthquakes; droughts; occasional cyclonic disturbances from the Indian Ocean bring heavy rains and flash floods |
| October | Anguilla | frequent hurricanes and other tropical storms (July to October) |
| October | Antigua and Barbuda | hurricanes and tropical storms (July to October); periodic droughts |
| October | Arctic Ocean | ... 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 to superstructure icing from October to May |
| October | Atlantic Ocean | ... as Bermuda and the Madeira Islands; ships subject to superstructure icing in extreme northern Atlantic from October to May; persistent fog can be a maritime hazard from May to September; hurricanes (May ... |
| October | British Virgin Islands | hurricanes and tropical storms (July to October) |
| October | Cocos (Keeling) Islands | cyclone season is October to April |
| October | Dominican Republic | lies in the middle of the hurricane belt and subject to severe storms from June to October; occasional flooding; periodic droughts |
| October | Haiti | lies in the middle of the hurricane belt and subject to severe storms from June to October; occasional flooding and earthquakes; periodic droughts |
| October | 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 ... |
| October | 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 |
| October | Pacific Ocean | ... cyclones (typhoons) in southeast and east Asia from May to December (most frequent from July to October); tropical cyclones (hurricanes) may form south of Mexico and strike Central America and Mexico from ... |
| October | Paraguay | local flooding in southeast (early September to June); poorly drained plains may become boggy (early October to June) |
| October | Saint Kitts and Nevis | hurricanes (July to October) |