Natural disasters

4. — a sudden electrical discharge in the atmosphere during a storm.
5. storm — a storm that coats surfaces with a layer of ice due to freezing rain.
7. surge — a rise in sea level caused by strong winds during storms.
9. storm — a strong windstorm that lifts large amounts of dust into the air.
11. — a storm that produces balls of ice called hail.
13. — an uncontrolled fire that spreads quickly through vegetation.
15. wave — a sudden drop in temperature over a short period.
18. — an opening in the Earth’s surface that releases lava, ash, and gases.
19. — a rapidly spinning column of air that extends from a thunderstorm to the ground.
20. — a sudden flow of snow and ice down a mountain.
21. — a tropical cyclone that occurs in the western Pacific Ocean.

1. — a series of large ocean waves caused by underwater earthquakes or eruptions.
2. — a hole in the ground caused by the collapse of surface layers.
3. — a severe snowstorm with strong winds and low visibility.
6. — sudden shaking of the ground caused by movement in the Earth’s crust.
8. — a powerful tropical storm with strong winds and heavy rain forming over warm oceans.
10. — the movement of rock, soil, and debris down a slope.
12. — a prolonged period of extremely high temperatures.
14. — an overflow of water that covers land that is usually dry.
16. — a long period with little or no rainfall causing water shortages.
17. — a large-scale air mass that rotates around a low-pressure center.