I guess it would depend on the aarngement with the tenants.
I notified my tenants before the cold snaps (due to a letter from my insurance company) that they must ensure the house was adequately heated and that they must notify me if they would be away from the house for any lenght of time over 24hrs so I could keep a check. They should also notify me if they were having problems funding the heating, as I would come to an agreement with them (never came to that & not 100% sure of what I would have agreed)
If there was a major leak, you may have to decide how long it's going to take to get the house habitable again & if the cost of getting it done in a rush. It may be better to part ways with the tenant if it's going to cost €100 per night for 2 & the rent is only, say €700, per month. It could take close to a month to get everything done....depending on how bad it is. That would cost € 3000 in hotels. Not all insurance policies cover alternative accomodation, especially if the insurance company decides not to pay out if enough steps were not taken to avoid the leaks.