Tuvalu is made up of 9 islands:
Tuvalu has four reef islands and five true atolls. The atolls have only 26 km land. Tuvalu is the fourth smallest country in the world. The land is very low lying and the coral atolls are narrow. Funafuti is the largest atoll of the islands and atolls. It has many islets around a central lagoon. This is about 25.1 kilometres (15.6 mi) (N–S) by 18.4 kilometres (11.4 mi) (W-E), centred on 179°7’E and 8°30’S. A
The highest height is 4.5 metres (15 ft) above sea level, which gives Tuvalu the second-lowest highest elevation of any country (after the Maldives). Because of this, the islands that make up Tuvalu are threatened by any sea level rise. If this happens, the people will have to go to New Zealand, Niue or the Fijian island of Kioa. Tuvalu is also affected by what is known as a king tide, which can raise the sea level higher than a normal high tide.
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- "Tuvalu". Central Intelligence Agency - The World Factbook. https://www.cia.gov/library/publications/the-world-factbook/geos/tv.html. Retrieved 2009-09-04.
- Lewis, James (December 1989). "Sea level rise: Some implications for Tuvalu". The Environmentalist 9 (4): 269–275. doi:10.1007/BF02241827. http://www.springerlink.com/content/7661437042415227/.
- "Tuvalu struggles to hold back tide". BBC News. 2008-01-22. http://news.bbc.co.uk/2/hi/science/nature/7203313.stm. Retrieved 2008-08-05.