urban area, which is much lower than the international average of 55%. Islands Antigua and Barbuda consists mostly of its two namesake islands, Antigua, and Barbuda. Other than that, Antigua and Barbuda's biggest islands are Guiana Island and Long Island off the coast of Antigua, and Redonda island, which is far from both of the main islands. Climate Rainfall averages per year, with the amount varying widely from season to season. In general the wettest period is between September and November. The islands generally experience low humidity and recurrent droughts. Temperatures average , with a range from to in the winter to from to in the summer and autumn. The coolest period is between December and February. Hurricanes strike on an average of once a year, including the powerful Category 5 Hurricane Irma, on 6 September 2017, which damaged 95% of the structures on Barbuda. Some 1,800 people were evacuated to Antigua. An estimate published by Time indicated that over $100 million would be required to rebuild homes and infrastructure. Philmore Mullin, Director of Barbuda's National Office of Disaster Services, said that "all critical infrastructure and utilities are non-existent – food supply, medicine, shelter, electricity, water, communications, waste management". He summarised the situation as follows: "Public utilities need to be rebuilt in their entirety... It is optimistic to think anything can be rebuilt in six months ... In my 25 years in disaster management, I have never seen something like this." Environmental issues Demographics Ethnic groups Antigua has a population of , mostly made up of people of West African, British, and Madeiran descent. The ethnic distribution consists of 91% Black, 4.4% mixed race, 1.7% White, and 2.9% other (primarily East Indian). Most Whites are of British descent. Christian Levantine Arabs and a small number of East Asians and Sephardic Jews make up the remainder of the population. An increasingly large percentage of the population lives abroad, most notably in the United Kingdom (Antiguan Britons), the United States and Canada. A minority of Antiguan residents are immigrants from other countries, particularly from Dominica, Guyana and Jamaica, and, increasingly, from the Dominican Republic, St. Vincent and the Grenadines and Nigeria. An estimated 4,500 American citizens also make their home in Antigua and Barbuda, making their numbers one of the largest American populations in the English-speaking Eastern Caribbean. 68.47% of the population was born in Antigua and Barbuda. Languages English is the