In many places, bare limestone rock is exposed at the surface while much land is swampy, impenetrable and uninhabitable. There are many large cave systems, including the impressive blue holes, formed when sea levels were lower and since flooded. There are no rivers or streams on any of the islands, but there is some freshwater, found close to the surface but resting on underlying saltwater. If wells are drilled too deep, they produce brackish or saltwater. Andros has a surplus of freshwater, which is barged to Nassau.
Most people drink bottled water.
Desalination plants are being built. About 15 island areas have been developed. The weather can be pleasant in the winter season although cold fronts from the North American continent can bring strong north winds, heavy rain and surprisingly low temperatures. The summer months are hot, humid and often windless, with frequent thunderstorms. North Eleuthera was badly damaged.