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For a U.S. address, answer “Does the tsunami warning apply to my location?” by checking two separate things: the current official message at Tsunami.gov and the official local evacuation map for your state, territory, county, or community. Search the local map for the exact home, workplace, school, beach, or other place you are considering. A boundary on the national warning map is a forecast-zone boundary, not automatically an evacuation line. If you feel strong or prolonged shaking, see the ocean suddenly withdraw or rise, or hear a loud ocean roar, leave the hazard area immediately rather than waiting for a message.
Start with the live message, then check the local map
A tsunami warning is time-sensitive. Open Tsunami.gov, the U.S. Tsunami Warning System page, and read the active event details instead of relying only on the headline banner. The site’s map help page explains that all active U.S. and Canadian alerts associated with an event appear below the map: Tsunami.gov map FAQ.
Next, find the evacuation or inundation map for the jurisdiction where the location sits. NOAA and the National Weather Service maintain a state-and-territory directory at Tsunami Evacuation and Inundation Maps by U.S. State and Territory. Select the relevant state or territory, open its local mapping resource, and search for the precise address or landmark.
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Use both sources together. The live message tells you what threat is being forecast now; the local map tells you whether the particular place is inside an area that local authorities may evacuate.
Use this five-step check
- Read the active event. On Tsunami.gov, open the event details and note the alert level, affected coastlines, estimated arrival information, expected impacts, and current instructions. Recheck the page because the status can change or be canceled.
- Open the local map. From the NWS directory, choose the state or territory and then the county, city, island, or community map that covers your location.
- Look up the exact place. Check the street address, building, school campus, workplace, campground, marina, beach access, or other destination. Also check places you visit regularly, not only your home.
- Match the map to local instructions. Read the map legend and any accompanying evacuation guidance. If local emergency managers issue an evacuation order, follow it even if the national map looks different.
- Resolve uncertainty through officials. If a boundary, address, or message is unclear, contact local emergency management or law enforcement, or your local NWS Weather Forecast Office. The Tsunami.gov FAQ specifically directs uncertain residents to those sources; it does not direct people to use 911 for routine zone clarification.
Why the national map and local evacuation map can disagree
The two maps serve different purposes. Tsunami.gov displays warning-center information using NWS forecast zones. Those zones are designed to communicate where a threat may affect the coast and can extend substantially inland. A local evacuation map is based on expected inundation and the routes and safe areas selected by local authorities.
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| Map or message | Primary purpose | Geographic precision | What determines your action |
|---|---|---|---|
| Warning-center alert coverage on Tsunami.gov | Communicates the current threat, forecast coverage, and alert status. | Broad NWS forecast zones that may reach inland beyond expected flooding. | Use it to understand the event, then apply current local instructions. |
| Local evacuation or inundation map | Identifies places that may need evacuation and routes toward safety. | Community, county, island, or state mapping at the level of streets and landmarks. | Use the mapped zone and instructions issued by local authorities. |
Therefore, appearing inside the colored boundary on the national map does not by itself mean that officials are telling you to evacuate from that address. Conversely, do not treat being outside a broad displayed boundary as permission to ignore a local order. The local map and the instructions accompanying the current event settle the question for a specific place.
Understand the four U.S. and Canadian tsunami alert levels
The National Weather Service uses four message levels for U.S. and Canadian coastlines. Read the live event text for the affected area and follow the directions attached to that event.
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Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →| Level | Meaning | Typical action |
|---|---|---|
| Warning | The most serious actionable level; dangerous tsunami effects are possible or occurring. | Evacuate the hazard or evacuation zone when the warning applies there, and follow local officials. Do not delay an ordered evacuation to wait for the estimated wave-arrival time. |
| Advisory | Dangerous currents or waves are possible. | Stay out of the water and away from beaches, marinas, rivers, and other waterways covered by the message. Follow local restrictions. |
| Watch | A tsunami is possible, but the threat and affected locations may still be developing. | Monitor official updates, check your local map, and be ready to act if the level changes or local authorities issue instructions. |
| Information statement | Provides information about an earthquake or tsunami evaluation. | Read the event details. The statement itself does not establish a local evacuation order. |
A warning message may include an estimated arrival time and a description of likely impacts. Treat that time as planning information, not as a countdown that permits delaying an evacuation. Dangerous flooding and currents can continue for hours or days, and the first wave may not be the largest. Return only after officials issue an all-clear.
Natural warnings override the wait for a phone alert
Official alerts can arrive through several channels, but a person may notice natural signs first. If you are in a coastal hazard area, an evacuation zone, or a low-lying coastal location, act immediately when any of these occur:
- You feel an earthquake that is strong or lasts a long time.
- The ocean suddenly withdraws or rises in an unusual way.
- You hear a loud roar from the ocean.
The NWS explains that a tsunami may arrive within minutes after such signs. Move inland or to higher ground, or to a designated vertical-evacuation structure where local plans identify one. Do not go to the shoreline to watch the water and do not wait for confirmation from Tsunami.gov. Natural signs and official messages are complementary; you may receive one without the other.
What to do when the warning applies to your location
Leave the mapped zone using the route in the local plan
Follow the evacuation route shown by your local authority and obey road closures, traffic control, and instructions from emergency personnel. If roads are damaged or congested, be prepared to travel on foot. Take only what you can carry without slowing your group; the priority is reaching safe ground or the designated safe building.
Move far enough, not merely out of sight of the water
Use the local map’s safe-area guidance rather than choosing a nearby hill or structure at random. Some communities identify vertical evacuation buildings when high ground cannot be reached quickly. Ask local emergency management before an event where those sites are and which buildings are approved.
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Stay away until the all-clear
Do not return after one wave or after the water appears calm. Tsunami currents and flooding can persist for hours or days, and later waves can be larger. Wait for an official all-clear and then follow any controlled-reentry instructions.
If you are outside the evacuation zone
NWS’s During a Tsunami guidance states: “If you are outside of the tsunami hazard or evacuation zone and you receive an official or natural tsunami warning, a tsunami is possible or likely, but you are in a safe place.” That statement assumes the local map correctly places you outside the hazard area and that local officials have not instructed you otherwise.
Remain alert to updates, avoid beaches and waterways when an advisory or stronger message covers them, and be ready to move if officials expand the evacuation area. A broad forecast-zone boundary can include places that are not expected to flood, but a local order always takes precedence over your own interpretation of a map.
Check home, work, school, and frequent destinations before an event
NWS preparedness guidance at Before a Tsunami recommends checking every place where you spend time. For each location, record the applicable map, the nearest safe area, and at least one route that does not depend entirely on a vehicle.
- Save or print the local evacuation map so it remains available if cellular service or power fails.
- Walk or drive the route at a normal time of day and consider how congestion, damaged roads, bridges, or closed gates could change it.
- Identify a backup route and a meeting point for household members, classmates, or co-workers.
- Ask schools, employers, hotels, and event venues which evacuation procedures they use.
- Find out whether your community recognizes a vertical-evacuation site and what access rules apply.
- Keep mobility, medical, communication, and pet needs in the plan; arrange assistance before an emergency.
Review the map whenever you move, change jobs or schools, or local authorities publish a revised hazard map. A saved screenshot is useful for orientation, but during an event always check the current official message and instructions.
How to interpret a map at an address
Start with the map legend, because colors and line styles differ among jurisdictions. Confirm that you are viewing the evacuation or inundation layer rather than a general coastal-risk or forecast layer. Locate the street, parcel, building, or landmark, then check which side of any boundary contains it. Large campuses, marinas, beaches, and apartment complexes can cross a line, so check the specific building or access point instead of assuming the whole property has one status.
Read the text that accompanies the map for route, safe-area, and vertical-evacuation guidance. A map may show an inundation estimate while a separate evacuation map identifies the area officials intend residents to leave. If the address cannot be found, the boundary is hard to distinguish, or two local maps appear inconsistent, stop interpreting it yourself and ask local emergency management or the local NWS office.
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Keep the message, map, and location matched
When checking an active event, write down the event name, alert level, affected coastline, and time of the latest update. Then compare that coastline with the jurisdiction of the address. A warning for one coast or island does not automatically create an evacuation order for every location shown on a national map. Conversely, local officials can issue protective directions that are more specific than the national display.
Continue monitoring after you begin moving. A watch can become a warning, an advisory can remain dangerous even without expected flooding, and a warning can be canceled or expanded. Do not rely on an old screenshot, an earlier text message, or a social-media post when the official event page has changed.
Where official updates appear
NWS lists local radio and television, marine radio, Wireless Emergency Alerts, NOAA Weather Radio, and NOAA websites such as Tsunami.gov as official warning channels. Use more than one channel because a notification may not reach every person at the same time.
A NOAA Weather Radio receiver can sound an alert when a compatible message is broadcast, but it cannot determine whether a particular street address lies inside a local evacuation zone. The local map and local emergency-management directions are still required for that address-level decision.
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Common mistakes when checking a tsunami warning
Relying on the banner alone
The top banner may not show every affected jurisdiction or the latest change. Open the event and review the active-message list below the map, as described in the Tsunami.gov FAQ.
Treating a forecast zone as a flood line
Forecast zones are intentionally broad. Use the local inundation or evacuation map to determine whether a building or street is in the area local authorities expect to evacuate.
Waiting for a second confirmation after natural signs
Strong or prolonged shaking, unusual water movement, and an ocean roar are warnings in themselves. Begin moving immediately; an official alert may follow later or may not reach you.
Using arrival time to postpone departure
An estimated arrival time is not a safe waiting period. Travel conditions can deteriorate, and dangerous effects can continue well beyond the first arrival.
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Returning when the water recedes
Receding water does not signal safety. Remain away until the official all-clear and any local reentry instructions.
When the location is outside the United States
The links and alert terminology above describe U.S. national guidance and the NWS directory of U.S. states and territories. Other countries use different warning centers, map systems, alert names, and evacuation authorities. If your location is outside the United States, identify the national or regional warning agency for that country and the local authority responsible for evacuation maps. Do not assume that a U.S. forecast-zone boundary or alert level applies elsewhere.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Questions readers often ask
Does being inside the Tsunami.gov colored area mean I must evacuate?
Not necessarily. The national display uses broad NWS forecast zones that can extend inland beyond expected inundation. Use the local evacuation map for the exact address and follow any order from local authorities. If the map and message leave you uncertain, contact local emergency management, law enforcement, or the local NWS Weather Forecast Office.
What if I am outside the local evacuation zone but receive a warning?
Check that you used the current local map and that the event applies to your coastline. NWS says a person outside the tsunami hazard or evacuation zone who receives an official or natural warning is in a safe place, provided local officials have not instructed otherwise. Stay alert, avoid beaches and waterways covered by the message, and be ready to move if the zone changes.
Is an advisory the same as an evacuation order?
No. An advisory indicates dangerous currents or waves and generally means staying out of the water and away from beaches, marinas, rivers, and other covered waterways. It is different from a warning that calls for evacuation of an applicable hazard or evacuation zone. Read the event’s local instructions rather than relying on the label alone.
Can I wait until the estimated arrival time?
No. An estimated arrival time is not a safe delay period. An evacuation order may apply immediately, travel can become difficult, and dangerous currents or flooding can last for hours or days. Leave when instructed, and if you experience strong or prolonged shaking or other natural signs, leave immediately without waiting for an official message.
What should I do if the local map does not show my address?
Check the map legend, search the nearest street or landmark, and verify that you opened the correct county, city, island, or community resource. If the boundary remains unclear, ask local emergency management or the local NWS office. Do not use the national forecast-zone boundary as a substitute for the local evacuation map.
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Can a phone alert tell me whether my home is in the zone?
A Wireless Emergency Alert or NOAA Weather Radio message can notify you of a threat, but it does not replace the address-level local map. Keep the local evacuation map available for home, work, school, and frequent destinations, and follow current local instructions during an event.
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- Open Tsunami.gov and read the active event details.
- Use the NWS state-and-territory directory to open the map for your jurisdiction.
- Search the exact address or landmark and read the map legend.
- Follow the local evacuation order or emergency instructions if they differ from your interpretation.
- If you feel strong or long shaking, see unusual ocean behavior, or hear a loud roar, evacuate immediately without waiting for an alert.
- Stay away until officials issue an all-clear.
Frequently Asked Questions
How do I know if my exact address is in a tsunami evacuation zone?
Open the NWS directory of tsunami evacuation and inundation maps, select your state or territory, and use the local map for your county, city, island, or community. Search the street address or landmark and read the legend and route instructions. If the boundary is unclear, contact local emergency management or the local NWS office.
Is the Tsunami.gov warning map an evacuation map?
No. Tsunami.gov uses broad NWS forecast zones to communicate threat coverage. Those zones can extend inland beyond expected flooding. The local evacuation or inundation map identifies streets, buildings, and landmarks that local authorities may direct people to leave.
What is the difference between a warning, advisory, watch, and information statement?
A warning is the actionable level that can require evacuation of an applicable zone. An advisory warns of dangerous currents or waves and means staying out of the water and away from covered waterways. A watch means a tsunami is possible, so monitor updates and be ready. An information statement provides information but does not itself establish a local evacuation order.
What should I do if I feel a strong earthquake near the coast?
Treat strong or prolonged shaking as a natural tsunami warning. Move inland or to higher ground, or to an approved vertical-evacuation site, without waiting for Tsunami.gov or a phone alert. Also act if the ocean suddenly withdraws or rises or you hear a loud ocean roar.
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Stay away until officials issue an all-clear and provide any reentry instructions. Dangerous flooding and currents can persist for hours or days, and the first wave may not be the largest. Do not return simply because one wave has passed or the water looks calm.
Can a NOAA Weather Radio receiver identify my evacuation zone?
No. It can receive compatible warning broadcasts, but it cannot determine whether a particular street address lies inside a local evacuation zone. Use the official local map and local emergency-management instructions for that decision.
The Bottom Line
To decide whether a tsunami warning applies, read the current Tsunami.gov event and then check the exact place on the official local evacuation map. Broad forecast-zone boundaries are not automatic evacuation lines. Local instructions control, and strong or prolonged shaking, unusual ocean movement, or a loud ocean roar means move immediately rather than waiting for an alert.
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