Japan Weather Warning Levels: Advisory, Warning, and Emergency

How serious is the alert on my phone right now?#

First, look for three details: the level number, the hazard, and the municipality. A Level 3 landslide warning for one district does not mean every part of the prefecture has the same risk. The alert may concern heavy rain, flooding, landslides, storm surge, or another hazard, and each one can require a different safe place.

Japan changed its weather-warning system on May 29, 2026. As of August 2026, JMA uses direct Level 1–5 names in English. Older guides and some apps may still show only “advisory,” “warning,” or “emergency warning,” so match the number and color on JMA’s current page.

JMA level	Current English name	What it means for a traveler
1	Early Advisory	Check the forecast, hazard map, route, and where you would shelter
2	Advisory	Weather may cause damage; change exposed plans and prepare to move
3	Warning	Older people and anyone needing extra time leave dangerous areas
4	Urgent Warning	Everyone in a dangerous area should evacuate; do not wait for Level 5
5	Emergency Warning	A disaster has occurred or is imminent; take immediate life-saving action

“Dangerous area” matters more than your hotel category. A riverfront path, basement room, steep hillside, underpass, coastal zone, or ground floor in a flood area can carry a different risk from a nearby upper-floor building.

How do the five weather levels connect to evacuation instructions?#

JMA issues weather risk information. The local municipality issues evacuation information for residents and visitors. These two systems support each other, but they are not the same message from the same authority.

At Level 1, find your municipality name in Japanese or English, save the JMA page, and ask your accommodation where the nearest safe place is. At Level 2, stop treating the alert as a background notification. Check whether your train, mountain route, coastal visit, or river activity would leave you exposed if conditions worsen.

At Level 3, older people, people with disabilities, families who need more time, and anyone unfamiliar with the route should leave dangerous areas early. Other travelers should finish preparations and be ready to move. Waiting until transport stops can remove safer options.

At Level 4, everyone in a dangerous area should evacuate according to local instructions. Level 4 is the point to act, not a rehearsal for Level 5. At Level 5, safe movement outdoors may no longer be possible. Move away from windows, floodwater, and the side of a building facing a slope; use a higher floor or another safer space only when that is the best available life-saving option.

Message source	What it tells you	What to do with it
JMA warning page	Hazard, level, affected area, issue time	Confirm the current risk for your municipality
Municipality alert	Evacuation instruction and local shelters	Follow the local action and route advice
Hotel or host	Building-specific safe area and exit	Ask which floor, stairway, or shelter to use
Railway or airline	Service status	Treat it as transport information, not proof that an area is safe

What should I do at a hotel, on a train, or outdoors?#

Your next action depends on where you are when the warning arrives.

At a hotel or ryokan: Show the alert to reception and ask, “Is this building in a flood, landslide, or storm-surge risk area?” Ask whether you should stay on a higher floor or go to a municipal shelter. Do not assume a basement lobby is safe during flooding or that an upper floor solves a landslide risk.

On a train: Listen for staff instructions and check the operator’s official service page. A train may stop before the weather reaches its worst point. Do not leave a safe station simply to follow the original itinerary. If you are stranded, ask staff which exit and nearby shelter avoid rivers, underpasses, and slopes.

Driving: Do not enter water covering a road. Depth, current, missing pavement, and open drains cannot be judged safely from the driver’s seat. If the route approaches a closed road, river, coast, or mountain pass, turn back while you still have a safe alternative.

Hiking, camping, or near water: Leave ridgelines, riverbeds, gorges, beaches, and exposed campsites before conditions deteriorate. Rain upstream can raise a river even if it is not raining where you are. A weather alert is not the time to continue toward a viewpoint to “check how it looks.”

How do I read hazard-specific warnings?#

The same level can refer to different hazards. Read the hazard label before deciding where to go.

Hazard	Places to avoid	Safer direction to consider
Heavy rain / flood	Rivers, canals, underpasses, basements, ground floors in flood zones	Higher ground or an appropriate upper floor
Landslide	Steep slopes, cliff edges, valley sides, rooms facing a slope	A sturdy place away from the slope
Storm surge	Coast, ports, low-lying waterfront districts	Inland and higher ground before roads flood
Strong wind	Windows, glass entrances, signs, trees, exposed platforms	Inside a sturdy building, away from glass
Snow	Mountain roads, unprepared hiking routes, exposed platforms	Indoors; wait for verified transport conditions

Do not combine hazards into one generic response. Moving upstairs may help in a flood but may not be enough beside a collapsing slope. Moving inland may help with storm surge but still place you beside a swollen river. Use the local hazard map and staff guidance together.

Which official page should I trust when apps disagree?#

Use JMA’s current English Weather Warning / Advisory page as the official weather source. Check the issue time and refresh it; screenshots and translated social posts can be old. If an app uses old terminology, find the corresponding JMA level rather than arguing over the translated word.

Then check the municipality’s evacuation information. Keep the address of your accommodation, its municipality, and a nearby landmark saved offline. Place names can be more precise than the city name familiar to tourists, and two wards in the same city can receive different alerts.

For a trip disruption rather than immediate danger, read what to do when a typhoon changes your bookings. For shaking or tsunami information, use the earthquake action guide. If someone is in immediate danger or seriously injured, call 119; Japan’s emergency-number guide explains when other consultation numbers apply.