If the Earth gets hotter, these are some of the things that could happen:
Water expands when it's heated so sea levels could rise.
Sea levels could also rise due to the melting of the glaciers and sea ice.
Animals like polar bears - which live on the ice - might die out.
There could be more floods, especially near the coast and rivers.
Extreme weather - flooding
Places that usually get lots of rain and snowfall might get hotter and drier.
Lakes and rivers could dry up.
There would be more droughts, making it harder to grow crops.
Less water would be available.
Some plants and animals might become extinct because they cannot cope with higher temperatures.
Hurricanes, tornadoes and other storms which are caused by changes in heat and water evaporation may get more common.