The Great Flood of Gun-Yu

The Great Flood of Gun-Yu (Chinese: 鯀禹治水), also known as the Gun-Yu myth, was a major flood event in ancient China that allegedly continued for at least two generations, which resulted in great population displacements among other disasters, such as storms and famine. People left their homes to live on the high hills and mounts, or nest on the trees. According to mythological and historical sources, it is traditionally dated to the third millennium BCE, or about 2300-2200 BCE, during the reign of Emperor Yao.

Emperor Yu and the great flood

Treated either historically or mythologically, the story of the Great Flood and the heroic attempts of Emperor Yu and various human characters to control it and to abate the disaster is a narrative fundamental to Chinese Culture. Among other things, the Great Flood of China is key to understanding the history of the founding of both the Xia dynasty and the Zhou dynasty, it is also one of the main flood motifs in Chinese mythology, and it is a major source of allusion in Classical Chinese poetry.

from wikipedia

see also this article about the geological facts behind this and other flood myths.

Emperor Yu once more, batteling the flood and a dragon.
A statue of Yu The Great in today’s China

द्वारका – Dwarka, the Gated City

The sea, which had been beating against the shores, suddenly broke the boundary that was imposed on it by nature. The sea rushed into the city. It coursed through the streets of the beautiful city. The sea covered up everything in the city. I saw the beautiful buildings becoming submerged one by one. In a matter of a few moments it was all over. The sea had now become as placid as a lake. There was no trace of the city. Dvaraka was just a name; just a memory.

Mausala Parva of Mahabharata

The sacred city appears in various Hindu and Budhist scriptures. It is believed to be the home of Krishna and have been submerged upon Krishna’s death. Today a modern city called Dwarka exists in the Arab Sea.

India; 3. Century BCE; Hindu, Hindu; Literature; City: Dwarka