Fires burned in France’s Aude wine region, along Bulgaria’s southern borders, near Montenegro’s capital and coast, and in Turkey’s northwest — and Hungary recorded record-breaking weekend temperatures.

A heat wave gripping parts of Europe sent temperatures over 40 degrees Celsius (109.4 Fahrenheit) in southern France and the Western Balkans on Monday, fueling wildfires, triggering top-level weather alerts and forcing evacuations in several countries across what scientists warn is the world’s fastest-warming continent.

The 39 beaches, including inland ponds and coastal beaches, are primarily closed due to unhealthy bacteria levels or harmful cyanobacteria (blue-green algae) blooms, according to the Massachusetts Department of Public Health’s (DPH) interactive beach water quality dashboard. Only one beach, at Walden Pond in Concord, was closed for “other” reasons.