Misc: Which major river flooded York in November 2000?

Questions

A sea wasp can kill a human in less than a minute, what kind of creature is it?

In which country did Arthur C Clarke make his home?

What reference book published in 1852 classified words for the first time according to the ideas that they expressed?

The prairie dog is a member of which order of animals?

Where is the Gulf of Carpentaria?