Absolutely. I think it's essential that some exception is made for emergency situations. There's no doubt that something terrible could happen and Parliament simply could not meet, or if it were to meet, it would have to fundamentally reorder itself. Prorogation then is essential.
As well, I wouldn't like to see set periods for a prorogation, because in an emergency situation or a war one might need to have a very extended period when the House is prorogued. But those are exceptions to the rule rather than what should and could be the norm in everyday Parliament.