Tourists in Rome and Paris scaled back their sightseeing in sweltering temperatures on Tuesday, dousing themselves at fountains and cooling down with ice cream as a heatwave continued in continental Europe.

"With this hot sun we try and keep to the cooler places," said Fari, a Spanish tourist to the Italian capital, speaking by the Trevi fountain.

"From 8 o'clock we are out looking at Rome, and from midday we eat ice cream," he added.