Each summer, the remote Italian island of Alicudi attracts a slow drip of tourists looking to escape the trappings of modernity. There are no cars or even roads on the two-square-mile volcanic outcrop, though footpaths are traversable by donkey. And while cellphone coverage is now available in most places, many houses lack electricity and water.

For the island’s residents, of whom there are around 100 (and whose number fall steeply in the winter), the remainder of the year is arguably far from idyllic. With no hospital, residents must travel by ferry — or, in an emergency, helicopter — for medical treatment.