People walk on a flooded street of the Old Town of Dubrovnik, Croatia, on July 28, 2019. The famous tourist destination was hit by heavy rain and thunderstorm on Sunday. (Marko Lukunic/Pixsell via Xinhua)

People walk on a flooded street of the Old Town of Dubrovnik, Croatia, on July 28, 2019. The famous tourist destination was hit by heavy rain and thunderstorm on Sunday. (Marko Lukunic/Pixsell via Xinhua)

People walk on a flooded street of the Old Town of Dubrovnik, Croatia, on July 28, 2019. The famous tourist destination was hit by heavy rain and thunderstorm on Sunday. (Marko Lukunic/Pixsell via Xinhua)

People walk on a flooded street of the Old Town of Dubrovnik, Croatia, on July 28, 2019. The famous tourist destination was hit by heavy rain and thunderstorm on Sunday. (Marko Lukunic/Pixsell via Xinhua)

People walk on a flooded street of the Old Town of Dubrovnik, Croatia, on July 28, 2019. The famous tourist destination was hit by heavy rain and thunderstorm on Sunday. (Marko Lukunic/Pixsell via Xinhua)

People walk on a flooded street of the Old Town of Dubrovnik, Croatia, on July 28, 2019. The famous tourist destination was hit by heavy rain and thunderstorm on Sunday. (Marko Lukunic/Pixsell via Xinhua)

Tourists pose in the rain on a street of the Old Town of Dubrovnik, Croatia, on July 28, 2019. The famous tourist destination was hit by heavy rain and thunderstorm on Sunday. (Marko Lukunic/Pixsell via Xinhua)