This topic you probably know about, but still it never hurts to raise awareness of this topic. On our planet (Earth) there's something called the atmosphere. It's the general word for all the layers around a material mass of weight (e.g. our globe) and is constantly attracted by the gravity of the mass. If the gravity is high and the tempature of the atmosphere is low then it will be retained for a longer time (read more at Wikipedia ). 

Around the stratosphere (look at first picture) is a protective layer called the ozone layer, which keeps our temperature at normal (over 0°c), if we didn't had this layer of greenhouse gases (what the ozone layer consists of) our globe would be covered in ice because of the high content of water that we have on our planet.

The problem here is that we have with time increased the amount of greenhouse gases through various products that have greenhouse gases in them (the greenhouse gases are: water vapour (comes when water turns to steam), carbon dioxide, methane, nitrous oxide and ozone) e.g. gasoline, oil, old fridges. The ozone layer function is to keep the heat in without letting it out (and to keep the ultra light in the sun rays from burning our globe into the size of an peanut) so because we have made the ozone layer larger/thicker, the globe is now suffering under extreme climate changes (sea level rise, volcanic eruption , increase in temperatures etc).

So now we need to take action.



Primitive picture of the Atmosphere



After a hurricane in Honduras



Forest Fire in Greece



Kobe (Japan) after an Earthquake



City after an hurricane


How it will look like in Denmark (this map can also be used for the rest of the world): 
http://www.dr.dk/Tema/vandetstiger/


For this links there's a few informations you should know, first of all that there's a few bugs on the map. e.g. it shows that some of Denmark is already under water. 
Because Denmark actually is some places. And when you increase the water level, please increase it as follows to get the right informations:
In Al Gore's movie ''The Inconvenient Truth'' he states that approximately within a 100 years the water level will rise up to 6 meters. Because of the sea level rising, the tidal waves will as well be able to rise to a height a of 5 meter (We cannot yet be sure that it will occur within a 100 years, since there's alot of unknown factors that we have yet to discover)

And know for the water level rising you have to do it like this:
6+5+1

The last one is that you have to calculate the wind as well, which also will be increasing under the storms making the water even come further into land. 

(there are alot of factors which we need to calculate with this simple piece of math before getting the correct answer, like the El Ninõ, time of day, Tidewater, water level around the chosen destination of the storm, circulations of the globe, occurrence of other nature phenomenons etc)