The Greek island of Santorini is being rattled by dozens of tremors, prompting authorities to close schools and airlines to announce additional flights on Monday to help people leave the popular tourist destination.

Schools will be closed Monday on the iconic Greek island of Santorini after a series of 200 earthquakes shook the popular tourist destination in recent days. Authorities have also advised residents to avoid large indoor gatherings and steer clear of multiple ports, including the old port of Fira, just below the island’s capital.