Sheikh `Abd Allah b. Mâni`
It does not seem that you have to reimburse the occupants for the damages they have suffered. You will only be liable if the building was not properly constructed or was in a state of disrepair due to carelessness and neglect on your part and the occupants were unaware of the true state of the property when they rented the place.
If the building was properly constructed and what happened was under force majeure, then there will be no liability on your part.
However, cases like this can only be decided by the courts. A judge should be handling this case and hear the pleas of both parties. He would be able to hear all the relevant testimonies and review all the pertinent documentation. He could ask for proofs and evidences and hear each litigant's responses to the evidence.
Source: Islam Today