Six tourists have died and at least 30 other people injured in a storm that hit Halkidiki in northern Greece.

Gale-force winds, heavy rain and hailstorms battered Halkidiki late on Wednesday.

A Czech couple died when their caravan was blown away, and two Romanians and two Russians were also killed, the BBC reported.

Deloitte’s UK lead partner for travel Alistair Pritchard was caught up in the storm and tweeted: “Genuinely one of the worst storms I have ever witnessed, but thankfully safe. My thoughts are with all the people and their families impacted.”

A state of emergency was declared and more than 100 rescue workers have deployed on the ground.

The storm has followed a spell of hot weather in Greece with temperatures reaching 37C in the past two days.

Trees have come down, cars have been overturned and buildings damaged in the violent weather.

Emily Kishtoo, from Surrey, told the BBC: “It literally came out of nowhere.

“The lights cut out on the beach that we were in – it was chaos. People running, screaming and just trying to basically get off the beach.”

Electricity supply at the popular resort has been intermittent, she said, with no running water on Thursday morning.

The Romanian woman and her child died after the roof of a restaurant collapsed at Nea Plagia.

The Russian man and his son were killed by a falling tree near their hotel in the resort of Potidea.