I feel 10,000 will be a good number. After all is said and done and all 6 reactors melt down I wouldn't be surprised to see 40k-50k dead. Its very sad but nothing can be done now.
Ur late number 4 had an explosion wall has been breached in two spaces. Now they are worried about number 5 and 6 as the heat has started to rise in them also.
A partial meltdown has already occurred in at least 1 and possibly all 4. Still waiting on 5 and 6 to go as they can not cool them and the plan to use sea water as a coolant has failed.