Similarly, a structure is yellow-tagged if it has been moderately damaged to the degree that its habitability is limited (only during the day, for example).
A green-tagged structure may mean the building is either undamaged or has suffered slight damage, although differences exist at local levels when to use a green tag.
Natural disasters such as earthquakes, floods and mudslides are among the most common causes of a building being red-, yellow- or green-tagged.
Usually, after such incidents, the local government body responsible for enforcing the building safety code examines the affected structures and tags them as appropriate.
Such signs provide the same information as "red-tagging" a building.