I don't think there is a way to "prepare" for this, except "Drink up, we're doomed"
I'm sure you've heard by now of the Chinese rocket stage that's tumbling around above the Earth. One estimate I saw this morning has it de-orbiting around 9PM EDT Saturday. There is a real-time tracking site here:
https://orbit.ing-now.com/satellite/...21-035b/cz-5b/
The biggest problem is that it is travelling at over 28000Km/hr, so it circles the Earth in about 15 seconds. The DoD has stated that they have "no plans" to use an intercepter (ABM) to destroy the rocket in a controlled manner.
Right now its orbit is from 45 South Longitude to 45 North Longitude.
How about a pool guessing where it comes down?
I know how my luck runs, so my guess is 42N 72W (give or take 100 miles).
TJC