Why get ready Now? Why not - just calm down -and wait to SEE what will happen?
Because-- Then it will be too late to get ready!
They were not aware of what was happening until the flood came and swept all of them away. That is how it will be when the Son of Man comes again. Matthew 24:39

I will test you with the measuring line of justice and the plumb line of righteousness. Since your refuge is made of lies, a hailstorm will knock it down. Since it is made of deception, a flood will sweep it away. I will cancel the bargain you made to cheat death, and I will overturn your deal to dodge the grave. When the terrible enemy sweeps through, you will be trampled into the ground. Again and again that flood will come, morning after morning, day and night, until you are carried away." Isaiah 28:17-19