Why is rainfall especially important to Bermuda’s drinking-water supply?

Rainfall is critical to Bermuda’s drinking-water supply because the islands lack natural freshwater sources such as lakes or rivers.1

While there are some wells and seawater distillation plants available, the islands rely almost entirely on precipitation to meet their water needs. Because the islands are composed of highly porous limestone, they cannot retain surface water, making the collection of rainfall essential for a consistent supply. Consequently, even occasional dry spells can become critical for the population.1