Severe weather warnings have been issued for European travel destinations due to scorching conditions.
Temperatures are forecast to exceed 40C as a heatwave sweeps across the south of the continent.
Meteoalarm, which is a network of national meteorological services in Europe, issued alerts for "very dangerous" weather due high temperatures in 11 countries such as Italy, Switzerland, Poland and Croatia.
Temperatures are expected to reach 41C in Seville, Spain; 39C in Rome, Italy; and 38C in Athens, Greece.
A spokeswoman for UK travel trade organisation Abta told the Press Association: "With very high temperatures being recorded across Europe, holidaymakers are being advised to make sure they take sensible precautions to avoid sunstroke and other serious problems that can result from over-exposure to heat and powerful sunshine."
Italian authorities told people in affected regions to "only travel if your journey is essential", while Polish officials said: "Protect yourself and support vulnerable people. Expect possible infrastructural breakdowns."
Among the victims of Friday's heat was the Uffizi Gallery in Florence, which shut its doors to the public after the air-conditioning broke down.
In Corsica, French authorities have ferried firefighters and trucks from the mainland to help battle a forest fire that has been raging for three days.
Last week, 10,000 people were forced to flee after blazes in the French Riviera last week.
Tourists also had to be rescued from the Italian island of Sicily because of wildfires.
