Why wait?
For example, my work could be done remotely if needed. We all have laptops that can be used at home if necessary but this is on a discretionary basis which they are not allowing at the moment. Instead they just send emails round warning that this might be needed if the situation gets worse.
Imo surely it's best that if any business can offer remote working then they do so as soon as possible? Not just hang around for a while to see?