Many regions in the world seems to be tackling a cold wave in the recent history. You can see the amazing pictures here, even in unusual places liek UAE and Saudi Arabia. For countries like Bangladesh Temperature dropping to close to 10 degrees is a disaster for many rural people as their homes or their clothes are not equipped to withstand this cold.
This reminds me of a Hollywood science fiction movie I watched recently "The Day After Tomorrow". The movie showed that due to global warming, melting of the polar ice had begun disrupting the North Atlantic current. It triggered violent weather across the world causing mass destruction. A hurricane like superstorm developed which had an eye where temperature dropped below -150 degree freezing everything in its path and leading to taking half of the world towards ice age. The developments may look like fantasy, but the theory has some merit as we can see from the affects of the recent weather.
I hope we will get some realistic explanation from the scientists.