Travellers heading for Europe are being warned to load up with sun hats and sun protection lotion.
A heatwave affecting much of Europe is expected to intensify further with countries - including France, Spain and Switzerland - expecting temperatures above 40C (104F).
Several European countries have recorded their highest-ever temperatures for June.
Meteorologists say hot air drawn in from the Sahara is responsible, and warn the heat is expected to rise further in the days ahead.
Hundreds of firefighters are battling wildfires in Spain's Catalonia region, while the ski resort of Val D'Isere in France - which sits at 1,850-metres altitude - experienced its highest temperature ever recorded with 29.2C.