A firefighting plane drops water to extinguish a forest fire on the Lustica peninsula near Tivat, Montenegro, on July 17, 2017. #

Firefighters try to extinguish a forest fire next to a monastery on Lustica peninsula near Tivat, Montenegro, on July 17, 2017. #

A cabin burns during a forest fire near Tivat, Montenegro, on July 17, 2017. #

An aircraft picks up water from the ocean before deploying to fight a raging fire in the Annunziata district of Messina, Italy, on July 10, 2017. #

A fire ravages a hill in the Annunziata district of Messina, Italy, on July 10, 2017. #

Smoke rises from fires on the slopes of Mount Vesuvius, east of Naples, on July 12, 2017. #

Smoke rises near burned land following a wildfire in Alijo, Portugal, on July 18, 2017. #

A wildfire is seen in the village of Mravince near Split, Croatia, on July 17, 2017. #

Police officers watch a wildfire in the village of Mravince near Split, Croatia, on July 17, 2017. #

A firefighting plane drops water to extinguish a fire in village of Strinjine near Split, Croatia, on July 18, 2017. #

A car burned by the wildfire in the village of Mravince near Split, Croatia, on July 17, 2017. #

A man observes wildfire in the village of Stobrec, Croatia, on July 18, 2017. #

A Canadair of the Croatian Air Force flies over the village of Gornje Sitno, near the Adriatic coastal town of Split, during a fire on July 17, 2017. #

A firefighter sprays water to extinguish a forest fire in Castagniers near Nice, France, on July 17, 2017. #

A Tracker firefighting airplane drops water with fire retardant chemicals over a fire near houses in Castagniers, near Nice, on July 17, 2017. #

Firefighters use a hose to spray water as they fight against a fire in Castagniers, near Nice, on July 17, 2017. #

Charred terrain and a burning tree trunk near firefighters battling a fire in Castagniers, France, on July 17, 2017. #

A firefighting plane drops flame retardant ton a forest fire in Castagniers, France, on July 17, 2017. #