If the swings in temperature/precipitation trends keep accelerating, yes, it's going to get scary in the next decade or two. The Earth's climatic system is huge and has great inertia, however, and if societal attitudes change a bit more quickly, a difference can be made in slowing down the process. It is important to keep in mind that we are "about due", or within the geologic time scale window (a couple thousand years wide) for another mini ice age.
With that in mind, it is a good idea to realize that we will have to adapt our crop growing regions and lifestyles down the road, regardless. It would be nice, and save innumerable lives, if we took this shit seriously to stave off the onset of a mini ice age until we're at a point technologically to cope with it first.
China is desperately trying to upgrade their electric power generation away from coal - look at how bad the air is in Beijing, to see why that impetus is obvious, and why they were so ruthless in getting the 3 Gorges hydroelectric dam system built. The US really, really, really needs to get cracking, since we do already have the money, tech and trained labor to upgrade our power sources away from CO2 releasing sources, too. Australia has to get on the solar convection tower model, and get off the coal, as well. People need to quit thumping their spears and pitchforks at proposals to build new nuclear plants; the French have it nicely figured out how to do it safely and extremely efficiently - 80% of their national power grid runs from their nuclear plants. It ain't the '70's, the tech is sound and safe.
Since the English speaking world seems hell bent on electing conservative climate change denialists to power, it is going to be important for people to socially educate their family, friends, and neighbors to reduce their carbon footprint so we can make some difference in the meanwhile. If you can afford it, gradually add solar panels to your roof, if you are an apartment dweller, dry your clothes on a portable clothes drying rack. There are lots of ways to help that don't break the bank and make a real difference, especially when you add up all the little "nickel and dime" things like LED light bulbs, etc.