What Should We Do When Flood Occur?

No offense, but your question is rather vague. There is much to consider when flodding occurs. Do, you live on high ground, low ground, in the country or in the city. The general rule of thumb is if you have notice of flood, seek high ground. If you are in low areas, move to high areas. If do not have time to move from the area go to the highest area in the building you are located such as a second floor. The key is to always be aware of your situation. If there is a great deal of rain or storms , watch the local weather. Watch the news. In other words, be prepared.

Well If theres tornado go as low as you can in your house so a flood is opposite you go as high as you can. No offense but you didnt know that?