Thanks to anon and Nairnlass for info:
Message on school phone service from the rector advising school will be open Wednesday for 4th, 5th and 6th years and on Thursday 3rd, 4th, 5th and 6th years.
You can listen to the message yourself on Highland Council schools phone service where you dial in on 08700 546 999 then enter the nairn academy code of 042 700 then choose option 3 for general messages. There will be further updates on that number.
UPDATE: meanwhile the Inverness Courier has now published a highly critical editorial article analysing the situation and giving further background to what happened. It is entitled 'Worthless policies' and you can read it here.