In 2314, all of the icebergs in both south and north poles started melting rapidly; therefore, all buildings, bridges, and streets started sinking. Skyscrapers the only shelter that humanity has were broken down due to the impact of flood. People were learning how to climb mountains in order to survive this disaster, but it was really difficult for some people. They also tried building ships, but the predators in the sea were hazardous because of the evolution of sea animals among all these years, there was also a new huge species of sea creatures that people didn't discover until this all happened. 

     However, the flood didn't stop that even the biggest mountains are sinking, so people had to leave earth until everything is over, or it might not. Fortunately, NASA predicted this disaster in prior; however, they built a fair amount of spaceships that is able to reach the closest planet, Mars. People rushed for these spaceships, but unfortunately there was no enough seats for all humankind, so only a small amount of people made it to Mars just to save the human race.

     If people thought about this before it happened, earth would have been rescued. This was all happened due to the reckless behavior that people used against the mother nature.

Sincerely,

The captain of NASA's spaceships :)