 By virtue of the contractual aspects of a lease, modern leases in America include an implied covenant of quiet enjoyment.This means that the landlord will not interfere with the tenant's possessory rights to the lease.Though a landlord may forcibly enter without required notice during an emergency, generally a mere necessity for quick action does not constitute an emergency within the doctrine of imminent peril, where the situation calling for the action is one which should reasonably have been anticipated and which the person whose action is called for should have been prepared to meet; the doctrine of imminent peril does not excuse one who has brought about the peril by her own negligence.