Potentially Fatal Home Out of Level

If there is wall and ceiling cracking, doors becoming stuck and difficult to open and close; and, cracks in the floor, there may be a very serious problem with the house level. When a house sinks in the ground over the years, cracks in the walls, ceiling;and, floors appear. If left without repair, the house may collapse on people inside; and, cause serious injury or death.
Signs the house is out of level: