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HawaiiAlert.jp

Real-time disaster alerts in Hawaii — delivered automatically to LINE in Japanese

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What is HawaiiAlert.jp?

Real-time notifications

Real-Time Notifications

Automatically fetches official disaster alerts issued by the State of Hawaii and delivers real-time updates for your safety.

AI Japanese translation

AI-Powered Japanese Translation

Official English alerts are automatically summarized and translated into easy-to-read Japanese by AI (ChatGPT).

LINE integration

Receive on LINE

Get notifications directly on LINE — no need to install new apps. Just add the account to start receiving updates instantly.

About the Project

HawaiiAlert.jp is a free service that automatically collects official disaster alerts in Hawaii — including tsunami, hurricane, flood, high surf, strong wind, and wildfire — and translates them into Japanese with AI. It’s designed to help Japanese tourists, residents, and students stay safe and informed during emergencies.

How It Works (3 Steps)

1

Scan the QR Code

Open your smartphone camera and scan the QR code below.

2

Add on LINE

Add “HawaiiAlert.jp” as a friend on LINE.

3

Receive Notifications

When a disaster alert is issued, you’ll receive a Japanese-language notification on LINE.

Get Alerts via LINE

Scan the QR code below to add us on LINE.
Notifications include disaster alerts only — no ads or promotions.

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Latest Disaster Alerts

Alert Summary Issued Expires
High Wind Warning
Location: Niihau; Kauai Southwest; Kauai Mountains; Waianae Coast; Oahu North Shore; Olomana; Central Oahu; Waianae Mountains; Lanai Mauka; Kahoolawe; Maui Windward West; Maui Leeward West; Kauai North; Kauai East; Kauai South; East Honolulu; Honolulu Metro; Ewa Plain; Koolau Windward; Koolau Leeward; Molokai Windward; Molokai Southeast; Molokai North; Molokai West; Molokai Leeward South; Lanai Windward; Lanai Leeward; Lanai South; Maui Central Valley North; Maui Central Valley South; Windward Haleakala; Kipahulu; South Maui/Upcountry; South Haleakala
Severity: Severe
Description: * WHAT...Southwest winds 25 to 40 mph with gusts up to 60 mph.

* WHERE...Kauai County, Oahu and Maui County.

* WHEN...Until 6 AM HST Sunday.

* IMPACTS...Damaging winds may blow down trees and power lines and
damage roofs. Power outages are possible. Travel will be
difficult, especially for high profile vehicles. 		Mar 14, 2:54 Mar 14, 18:00
Flash Flood Warning
Location: Oahu in Honolulu, HI
Severity: Severe
Description: At 250 AM HST, radar indicated moderate to heavy rain over Oahu,
with rain falling at a rate of half an inch to an inch per hour.
Additional rain is expected to fall during the next couple of hours
over already saturated ground, leading to additional flash flooding.

HAZARD...Flash flooding caused by heavy rain.

SOURCE...Radar.

IMPACT...Flooding in drainages, streams, rivers, roads,
properties, and other low-lying areas. Public road
closures possible in some areas. Landslides are possible
in steep terrain.

Some locations that will experience flash flooding include...
The entire island of Oahu. 		Mar 14, 2:50 Mar 14, 4:00
Flood Watch
Location: Waianae Coast; Oahu North Shore; Olomana; Central Oahu; Waianae Mountains; East Honolulu; Honolulu Metro; Ewa Plain; Koolau Windward; Koolau Leeward
Severity: Severe
Description: ...FLOOD WATCH FOR KAUAI THROUGH THIS AFTERNOON...
...FLOOD WATCH FOR OAHU THROUGH TONIGHT...
...FLOOD WATCH FOR MAUI COUNTY AND THE BIG ISLAND THROUGH SUNDAY
NIGHT...

* WHAT...Flash flooding caused by excessive rainfall is possible.

* WHERE...Oahu.

* WHEN...Through late tonight.

* IMPACTS...Significant flooding may occur due to the overflow of
streams and drainages. Roads in several areas may be closed, along
with property damage in urban or low lying spots due to runoff.
Landslides may also occur in areas with steep terrain.

* ADDITIONAL DETAILS...
- Considerable flash flooding remains possible as a large and
powerful kona storm northwest of the state draws deep
tropical moisture northward across the islands. Persistent
bands of heavy rain and thunderstorms may produce intense
rainfall rates, leading to rapid rises in streams and
flooding of roads and low lying areas. 		Mar 14, 2:49 Mar 14, 18:00
High Wind Warning
Location: Niihau; Kauai Southwest; Kauai Mountains; Waianae Coast; Oahu North Shore; Olomana; Central Oahu; Waianae Mountains; Lanai Mauka; Kahoolawe; Maui Windward West; Maui Leeward West; Kauai North; Kauai East; Kauai South; East Honolulu; Honolulu Metro; Ewa Plain; Koolau Windward; Koolau Leeward; Molokai Windward; Molokai Southeast; Molokai North; Molokai West; Molokai Leeward South; Lanai Windward; Lanai Leeward; Lanai South; Maui Central Valley North; Maui Central Valley South; Windward Haleakala; Kipahulu; South Maui/Upcountry; South Haleakala
Severity: Severe
Description: * WHAT...Southwest winds 25 to 40 mph with gusts up to 60 mph Kauai
County, Oahu, Maui County.

* WHERE...KAUAI COUNTY, OAHU, MAUI COUNTY

* WHEN...Until 6 AM HST Sunday.

* IMPACTS...Damaging winds may blow down trees and power lines and
damage roofs. Power outages are possible. Travel will be
difficult, especially for high profile vehicles. 		Mar 14, 2:03 Mar 14, 15:15
Flash Flood Warning
Location: Oahu in Honolulu, HI
Severity: Severe
Description: FFWHFO

The National Weather Service in Honolulu has extended the

* Flash Flood Warning for...
The island of Oahu in Honolulu County

* Until 400 AM HST.

* At 1227 AM HST, radar indicated rainfall had diminished over Oahu,
with rain now falling at a rate of half an inch per hour.
Emergency Management reports ongoing flooding issues across the
island however, and additional rainfall is developing and expected
to move into the island during the next hour or so. Flash flooding
is expected to continue.

HAZARD...Flash flooding caused by heavy rain.

SOURCE...Radar.

IMPACT...Flooding in drainages, streams, rivers, roads,
properties, and other low-lying areas. Public road
closures possible in some areas. Landslides are
possible in steep terrain.

* Some locations that will experience flash flooding include...
The entire island of Oahu. 		Mar 14, 0:27 Mar 14, 4:00

Frequently Asked Questions (FAQ)

Is the service free? ▼
Yes, HawaiiAlert.jp is completely free to use.
What kind of notifications will I receive? ▼
Only Japanese translations of official disaster alerts (tsunami, hurricane, flood, high surf, strong wind, wildfire) for Oʻahu are sent. No ads or unrelated notifications.
Which islands are covered? ▼
Currently, only alerts for the island of Oʻahu are delivered.
How often will I get alerts? ▼
You’ll only receive messages when an alert is officially issued. Some weeks may have multiple alerts, while others may have none.
Can I stop the notifications? ▼
Yes. You can stop notifications anytime by blocking or removing the account on LINE.
What are your data sources? ▼
Official alerts from PTWC (Pacific Tsunami Warning Center), NWS (National Weather Service), CPHC (Central Pacific Hurricane Center), and HI-EMA (Hawaii Emergency Management Agency).
Is the translation accurate? ▼
Alerts are summarized and translated by AI for clarity. While accuracy is prioritized, minor differences may occur — always confirm with official English sources when possible.
I’m not receiving any notifications ▼
Try blocking and re-adding the account on LINE. This usually resets the connection and restores delivery.
How do you handle privacy? ▼
We do not collect any personal information. Only your LINE account ID (anonymous) is used for notification delivery.
Is Japanese the only supported language? ▼
Currently, yes. English support is under development for future expansion.
How can I contact you? ▼
Please reach out via the Contact page on this website. Response times may vary depending on inquiries.

Message from the Developer

HawaiiAlert.jp was created to help Japanese visitors and students in Hawaii access accurate disaster information and take safe action during emergencies.

The system automatically retrieves official alerts issued by the State of Hawaii, summarizes them with AI, and delivers Japanese translations directly to LINE.

We hope this service helps more people stay safe and informed while in Hawaii.

Wishing you a safe and enjoyable stay in the islands.