Tuvalu consists of four reef islands and five true atolls. Its small, scattered group of atolls has poor soil and a total land area of only about 26 square kilometres (less than 10 sq. mi.) making it the fourth smallest country in the world. The land is very low lying with narrow coral atolls. Funafuti is the largest atoll of the nine low reef islands and atolls that form the Tuvalu volcanic island chain. It comprises numerous islets around a central lagoon that is approximately 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. An annular reef rim surrounds the lagoon, with several natural reef channels.
The highest elevation is 4.5 metres (15 ft) above sea level, which gives Tuvalu the second-lowest maximum elevation of any country (after the Maldives). Because of this low elevation, the islands that make up this nation may be threatened by any future sea level rise. Under such circumstances, the population may evacuate to New Zealand, Niue or the Fijian island of Kioa. Additionally, Tuvalu is affected by what is known as a king tide, which can raise the sea level higher than a normal high tide. In the future, this may threaten to submerge the nation entirely. Tuvalu has very poor land and the soil is hardly usable for agriculture. There is almost no reliable supply of drinking water. Tuvalu has westerly gales and heavy rain from November to March and tropical temperatures moderated by easterly winds from March to November.
The highest elevation is 4.5 metres (15 ft) above sea level, which gives Tuvalu the second-lowest maximum elevation of any country (after the Maldives). Because of this low elevation, the islands that make up this nation may be threatened by any future sea level rise. Under such circumstances, the population may evacuate to New Zealand, Niue or the Fijian island of Kioa. Additionally, Tuvalu is affected by what is known as a king tide, which can raise the sea level higher than a normal high tide. In the future, this may threaten to submerge the nation entirely. Tuvalu has very poor land and the soil is hardly usable for agriculture. There is almost no reliable supply of drinking water. Tuvalu has westerly gales and heavy rain from November to March and tropical temperatures moderated by easterly winds from March to November.
