word | | Natural hazards |
| glaciers | 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 ... |
| Grand | Comoros | cyclones possible during rainy season (December to April); Le Karthala on Grand Comore is an active volcano |
| grassland | Mongolia | dust storms; grassland and forest fires; drought; "zud," which is harsh winter conditions |
| gravity | Antarctica | katabatic (gravity-driven) winds blow coastward from the high interior; frequent blizzards form near the foot of the plateau; cyclonic storms form over the ocean and move clockwise along the coast; volcanism ... |
| Great | 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 |
| Great | Ethiopia | geologically active Great Rift Valley susceptible to earthquakes, volcanic eruptions; frequent droughts |
| Greenland | 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 ... |
| Guadeloupe | 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) |
| Gulf | Mexico | tsunamis along the Pacific coast, volcanoes and destructive earthquakes in the center and south, and hurricanes on the Pacific, Gulf of Mexico, and Caribbean coasts |
| Gulf | Sweden | ice floes in the surrounding waters, especially in the Gulf of Bothnia, can interfere with maritime traffic |
| Gulf | United States | tsunamis; volcanoes; 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; flooding ... |
| Haakon | Jan Mayen | dominated by the volcano Haakon VII Toppen/Beerenberg; volcanic activity resumed in 1970; the most recent eruption occurred in 1985 |