And a new report by Climate Central is sharing its global warming message in the form of edited images.

In a series of photos of London (seen in the video), the first image is edited to show what the city would look like after the Earth warms 2 degrees Celsius, or about 3.6 degrees Fahrenheit. The second image shows the sea level rise after the Earth is warmed 4 degrees Celsius, or 7.2 degrees Fahrenheit. It's significant.

In the same projections for New York City after the Earth warms 2 degrees Celsius, you can still see the bull on Wall Street. Not the case after warming 4 degrees Celsius.

What would Hong Kong look like if global warming reached 2 degrees Celsius? Lots of streets would be under water.

According to Climate Central, those images could soon be the reality. A different report released Monday by the U.K. Met Office agrees. It says 2015 is on track to be 1 degree Celsius hotter than ever before.

And warmer temperatures mean higher sea levels. Climate Central says global warming has caused global sea levels to rise 8 inches since 1880, and the rate is accelerating.

The study projects that a 2-degree Celsius increase in temperatures would put about 280 million people underwater.

So what do we do to keep all of us on dry land? That's what world leaders will be discussing in Paris next month.

The video includes images from Climate Central