More Than One Item Damaged or Lost
Generally, events closely related in origin cause a single casualty or theft event.
For example, wind and flood damage from the same storm cause a single casualty which could damage many items or personal property such as rugs, furniture, and electronic equipment.
What to do when more than one item is damaged or lost?
If a single casualty or theft involves more than one item of personal property, you must figure the loss on each item separately. You then combine the losses to figure your total loss from that casualty or theft. To figure the loss on personal use real property, treat the entire property (buildings, trees, shrubs, and improvements) as one item.