Add one card to "Chance" that indicates a "natural disaster" and one card to "Community Chest" that indicates a "man-made disaster." The property that is affected is determined when the card puller rolls the die again and, counting only his/her own property, must surrender all houses and hotels, and the cards back to the banker who holds them for 5 minutes before putting them up for sale again to the next person to land on the property.

paper money, metal pieces, wooden houses & hotels

Chris