Hawaii Disaster Alerts in English & Japanese | Tsunami, Hurricane, Flood, Wildfire, High Surf

What is HawaiiAlert.jp?

Real-Time Notifications

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

AI-Powered Japanese Translation

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

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)

Scan the QR Code

Open your smartphone camera and scan the QR code below.

Add on LINE

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

Receive Notifications

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

Latest Disaster Alerts

Alert Summary	Issued	Expires
Flood Watch Location: Waianae Coast; Oahu North Shore; Olomana; Central Oahu; Waianae Mountains; East Honolulu; Honolulu Metro; Ewa Plain; Koolau Windward; Koolau Leeward Severity: Minor Description: The Flood Watch has been cancelled and is no longer in effect.	Mar 14, 20:42	Mar 14, 20:57
Wind Advisory Location: Niihau; Kauai Southwest; Kauai Mountains; Waianae Coast; Oahu North Shore; Olomana; Central Oahu; Waianae Mountains; Kauai North; Kauai East; Kauai South; East Honolulu; Honolulu Metro; Ewa Plain; Koolau Windward; Koolau Leeward Severity: Moderate Description: * WHAT...Southwest winds 25 to 35 mph with gusts up to 55 mph Kauai County and Oahu. * WHERE...Portions of Kauai, Niihau, and Oahu. * WHEN...Until 6 AM HST Sunday. * IMPACTS...Winds this strong can tear off shingles, knock down tree branches, blow away tents and awnings and make it difficult to steer, especially for drivers of high profile vehicles.	Mar 14, 15:24	Mar 15, 6:00
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 OAHU THROUGH TONIGHT... ...FLOOD WATCH FOR MAUI COUNTY AND THE BIG ISLAND THROUGH SUNDAY NIGHT... ...FLOOD WATCH FOR KAUAI COUNTY CANCELED... * WHAT...Flash flooding caused by excessive rainfall continues to be 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, 15:04	Mar 15, 6:00
Flood Advisory Location: Oahu in Honolulu, HI Severity: Minor Description: The Flood Advisory has been cancelled and is no longer in effect.	Mar 14, 14:36	Mar 14, 14:51
Flood Advisory Location: Oahu in Honolulu, HI Severity: Minor Description: * WHAT...Flooding caused by excessive rainfall. * WHERE...The island of Oahu in Honolulu County. * WHEN...Until 300 PM HST. * IMPACTS...Minor flooding on roads, poor drainage areas, and in streams. * ADDITIONAL DETAILS... - At 1156 AM HST, radar indicated heavy rain moving over Oahu from the southwest. Rain was falling at a rate of 0.5 to 1 inches per hour. - Some locations that will experience flooding include... The island of Oahu.	Mar 14, 11:58	Mar 14, 15:00

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.

HawaiiAlert.jp