What they want, rather, is for people to stagger their donations. So that there's a more steady stream of donations every day. Not thousands in one blow. SO it may be best to wait some days, or even a week or more.
Also don't forget, there is going to be a strain on the local blood supplies because of this. So they are going to need donations for a long time yet.
Remember too that there are others who need blood year-round, without the benefit of a CNN reporter rallying assistance for them. So please consider becoming a regular donor
Just thought I'd share that, for those who might be thinking about donating