word | | Natural hazards |
| common | Central African Republic | hot, dry, dusty harmattan winds affect northern areas; floods are common |
| common | 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 |
| common | Korea, South | occasional typhoons bring high winds and floods; low-level seismic activity common in southwest |
| common | 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 ... |
| common | Mali | hot, dust-laden harmattan haze common during dry seasons; recurring droughts; occasional Niger River flooding |
| common | New Zealand | earthquakes are common, though usually not severe; volcanic activity |
| common | Pacific Ocean | ... may form 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 ... |
| common | Qatar | haze, dust storms, sandstorms common |
| common | Timor-Leste | floods and landslides are common; earthquakes, tsunamis, tropical cyclones |
| Comore | Comoros | cyclones possible during rainy season (December to April); Le Kartala on Grand Comore is an active volcano |
| completely | Mauritius | cyclones (November to April); almost completely surrounded by reefs that may pose maritime hazards |
| concrete | Belgium | flooding is a threat along rivers and in areas of reclaimed coastal land, protected from the sea by concrete dikes |
| conditions | Mongolia | dust storms, grassland and forest fires, drought, and "zud," which is harsh winter conditions |
| conditions | 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 |
| Congo | 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 |
| Congo | Rwanda | periodic droughts; the volcanic Virunga mountains are in the northwest along the border with Democratic Republic of the Congo |
| constant | Dominica | flash floods are a constant threat; destructive hurricanes can be expected during the late summer months |
| constant | Guyana | flash floods are a constant threat during rainy seasons |
| constant | Saint Vincent and the Grenadines | hurricanes; Soufriere volcano on the island of Saint Vincent is a constant threat |
| continental | Southern Ocean | ... m thick) with sometimes dynamic short-term variations and with large annual and interannual variations; deep continental shelf floored by glacial deposits varying widely over short distances; high winds and large waves ... |
| continuous | 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 ... |
| continuous | Greenland | continuous permafrost over northern two-thirds of the island |
| continuously | Montserrat | severe hurricanes (June to November); volcanic eruptions (Soufriere Hills volcano has erupted continuously since 1995) |
| Cunha | Saint Helena | active volcanism on Tristan da Cunha, last eruption in 1961 |
| Curacao | 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 |
| cyclical | Pacific Ocean | ... 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 in the Western ... |