I know the info received is vague, but the advice is that everyone is safer at home and that is the best place to be. If you can keep children home tomorrow please do. There is no teaching going on, it's babysitting. Of course if you need to be at work and have no other option, then send them in, but this isn't about keeping routine or your children being taught.
Please do think carefully about it and also the school staff who are going to be looking after your children and not their own.
Stay safe.