I had a similar situation at Luton with Wizzair (as well as everyone else) cancelling all flights on Feb 9 due to Ciara.

Wizzair sent an email about the cancellation whilst I was in the airport terminal: In event of re-routing, when the time of departure of the new flight is on another day than original flight departure, we arrange hotel accommodation and transport between the airport and place of accommodation free of charge. Our handling agent will be able to recommend hotels in the area.

In case Wizz Air or the ground handling agents at the airport could not assist you with organizing hotel accommodation, transportation, refreshments or meals, we kindly advise you to arrange those on your own expense and keep all the related receipts...

The passenger services helpdesk had a huge line (simply because many folks needed rebooking) and was also advising people to arrange everything and just keep the receipts for the expense claim.