I would have said, in serious numbers, starting from 2025 onwards. Luckily I will be dead by then.

I have just finished reading Wild Swans, autobiography by Jung Chang, and what she describes of China in her lifetime, is truly tragic. As you say, there are many bad things coming, but it sounds like your beliefs about the floodings indicate you believe what the globalists are trying to sell us about global warming. The catastrophe will not be from the climate change, but from believing them. With HARP and other systems being developed by various countries, it is possible they will do something to cause earthquakes, storms and droughts.