The restaurant had a small fire at the end of March, where there was minimal damage. They were supposed to open again a few days later, and may have, but they confirmed in April on Facebook that they were closing. It appears the fire was not the reason for the closure. Abudanza's commercial kitchen and restaurant equipment is now going up for auction on May 28th.
It appears that their Abudanza Express location is still operating as their Facebook page still advertises specials. The Express location was opened after the Restaurant Impossible makeover.
You may remember this episode due to their son LJ having an incurable disease called ROHHAD. This will be the third restaurant from season nine (2014) of Restaurant Impossible to close and the Restaurant Impossible Update Page has been updated with this information.