How will we build houses stronger because of the floods in climate change or global warming?

Strength is not really the issue when it comes to floods. Stronger houses are more able to withstand earthquakes, but they can be flooded just as easily. The key to surviving floods is to build your house at a higher elevation. Another alternative would be to live on a houseboat. If it's already floating, it won't flood.

There are also other ways to build houses that are less vulnerable to floods. In some areas houses are built on stilts. Certainly if you are expecting floods, you would not build a basement, which is the part of the house that is most vulnerable to flooding.