Causes of Flooding in East coast and Johor

What's been the causes of flooding in east coast Malaysia and Johor? Last year it was bad enough that few cities in Johor were flooded and thousands of people needed to be evacuated to a higher and safer place for weeks. Properties, personal belongings and many others were washed away and lost during and after the floods.

This has never happen before and only recent years that situation is getting worse. I guess from now on, those places experience flood during year end monsoon season will start to worry about their properties comes year end. They will probably have to look for places to start moving so they would not suffer this year after year.

Why would this happen now more often than before? Is this the effect of global warming and the rise in sea level? Where are those excess water coming from? Or is it our drainage system partly to be blame for causing the flood? Places affected by flood are mainly located at the mountain footing or near rivers, and this may explain the our drainage system may be one of the reason causing such flood.

I remember looking at news last year that river cutting across Segamat town was overflowed and the water flowing out of the river is insufficient, despite the river is so wide and deep. Also the whole town was flooded till the roof top of the shop houses.

In such situation, the rescuers reaction to this was very slow, and it looks like they don't know what to do in such situation, and they probably didn't expect such things to happen in their area. That sums it up why they reacted so slowly to it and comparing this year, they are much faster since they have a hands on experience about it. So do give credits to the rescuers on this account.

I hope this scenario of flooding would not happen so badly next year, and hope everyone could do something to minimise, if not stop the global warming.