Multiple earthquakes are rattling Santorini, a volcanic island in Greece, prompting authorities to dispatch rescuers with tents, a sniffer dog and drones, and to shut schools on four islands. Residents have been warned to avoid indoor gatherings,

Thousands of people are fleeing the Greek island of Santorini as increased seismic activity spurs fears of a more powerful earthquake at the site of one of the largest volcanic eruptions in history.