FEMA search and rescue markings are standardized spray-painted symbols left on buildings by Urban Search and Rescue teams to show what has already been searched, what hazards are inside, and whether any victims were found. The most familiar one is the large X near the front door, but teams also use a separate box for structural safety and a V to mark where a person was located. Each symbol is drawn to a set format from the FEMA Field Operations Guide so any responder arriving later can read it at a glance.1Federal Emergency Management Agency. Rescue Field Operations Guide
The Search X and Its Four Quadrants
The X is drawn in two stages. When a team enters a building, they paint a single diagonal slash near the main entry and write their task force ID, the date, and the time next to it. That first slash tells anyone else on scene that a search is in progress and not to duplicate it.1Federal Emergency Management Agency. Rescue Field Operations Guide
When the team comes back out with everyone accounted for, they paint a second slash across the first. The completed X means the building has been fully searched. The four open spaces around the X then get filled in:1Federal Emergency Management Agency. Rescue Field Operations Guide
- Top: the date and time the team left the building.
- Left: the task force identifier, usually an abbreviation or unit number.
- Right: hazards found inside, such as gas leaks, unstable floors, chemical contamination, or aggressive animals.
- Bottom: victims found, with live and deceased counted separately. A note reading “2L/0D” means two living victims were located and none deceased.
If a later team searches the building again, they cross out the old X and paint a fresh one with updated information. The marking on the wall is always meant to reflect the most recent search.
When the Search Wasn’t Finished
Not every search gets completed. A floor may be too unstable to reach, or conditions may force the team out. In that case they place a filled-in circle at the center of the initial slash and add a small box below it noting which areas actually were searched, using “F” for floors and “Q” for quadrants of the building. If the team only assessed the outside and never went in, as often happens during hurricane response, they write “No Entry” inside the box.1Federal Emergency Management Agency. Rescue Field Operations Guide
This is the marking to read most carefully if you find one on your building. It tells you the interior was not fully cleared.
The Structure Safety Box
Separate from the X, teams paint a box-shaped marking to communicate how safe the building itself is for rescue work. It sorts structures into three categories:1Federal Emergency Management Agency. Rescue Field Operations Guide
- Relatively safe: stable enough for normal search and rescue work.
- Significantly damaged: serious damage, and shoring or hazard removal may be needed before crews can operate inside.
- Not safe for operations: high risk of further collapse; extensive safety measures are required before entry, and in practice many of these buildings are effectively off-limits for hands-on searching.
Alongside the box, the team writes the date, time, their task force ID, and any specific hazards they observed.
The V for Victim Locations
Inside a structure, or sometimes on an exterior wall closest to where a person was found, teams use a V symbol to pinpoint victims:1Federal Emergency Management Agency. Rescue Field Operations Guide
- A plain V marks a potential victim location that has not been confirmed.
- A V with a circle around it means a confirmed live victim. If there is more than one, the total is written below.
- A V with a line through it means a confirmed deceased victim, again with the count below if more than one.
- An arrow next to the V points toward the exact position, with the distance written along the arrow.
After a victim is removed, the V gets crossed out so no one wastes time searching for someone who has already been extracted.
If You See a Box Instead of an X
Not every marking in the United States will follow the FEMA format. Under the INSARAG system developed by the United Nations, teams use a large box roughly one meter square near the entry point instead of an X. Team identifiers, worksite IDs, dates, times, and the level of search completed go inside; hazards go above, triage categories below. A horizontal line drawn through the whole marking means all work at the site is finished and no more victims are expected. INSARAG also uses a diamond-shaped rapid clearance marking with a “C” for buildings confirmed completely clear and a “D” for buildings where only deceased victims remain.2International Search and Rescue Advisory Group. INSARAG Guidelines Volume II, Manual B If you find a box-style marking on a U.S. building, it likely came from an international team or a domestic crew operating under INSARAG protocols.
What the Markings Mean if One Is on Your House
A large painted X on your home after a disaster can be unsettling, but the marking itself carries no legal condemnation. It is an operational tool for search teams, not a building code notice and not a demolition order. Paint and chalk weather away, and most homeowners paint over the marking or power-wash it off once it is safe to return.
Read what it says before you do anything else. If the right quadrant lists hazards like gas leaks or structural instability, take those warnings seriously before going back in. If the structure box indicates the building is not safe for rescue operations, it almost certainly is not safe to live in either, and hiring a structural engineer to inspect the property before you re-occupy it is worth the cost. A licensed engineer’s documentation of structural damage also carries far more weight with an insurance adjuster than a verbal description.
The bottom quadrant matters too. A count showing that victims were found in your building, or next door, can be relevant when you talk with insurance adjusters or local emergency management about how severe the event was in your specific area.