Fill in the gaps with the right words.

1. A ... is the same as a tidal wave.
2. A large ... can run down a mountain for many miles and destroy everything in its path.
3. More than 70 people suffered from the ... yesterday after a dam burst.
4. A ... is a long period when there is very little or no rain.
5. Katrina is estimated to be one of the worst ever ... in the world.
6. A storm with strong winds and snow is called a ... .
7. An ... is the shaking of the surface of the Earth.