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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

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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

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2

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3

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

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Notifications include disaster alerts only — no ads or promotions.

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Latest Disaster Alerts

Alert SummaryIssuedExpires
Coastal Flood Statement
Location: Oahu North Shore; Olomana; Maui Windward West; Kauai North; Kauai East; Koolau Windward; Molokai Windward; Molokai North; Molokai West; Lanai Windward; Maui Central Valley North; Windward Haleakala; Big Island East; Big Island North
Severity: Minor
Description: ...HIGH SURF WARNING FOR SOUTH FACING SHORES OF ALL HAWAIIAN
ISLANDS THROUGH TUESDAY MORNING...
...COASTAL FLOODING DURING HIGH TIDES THROUGH TUESDAY...

.The combination of a large long-period south-southwest
(200 degree) swell and King Tides will cause significant wave up
and could cause widespread coastal flooding during the afternoon
high tides along south facing shores. Also due to the highest
monthly tides and water levels running higher than predicted at
select areas, flooding along all shorelines and in low-lying
coastal areas are expected especially during the late afternoon
and early evening hours.

* WHAT...Isolated minor coastal flooding.

* WHERE...Vulnerable low-lying coastal roadways, docks, boat
ramps and other coastal infrastructure.

* WHEN...Around the daily peak tides during the late afternoon
and early evening hours through Tuesday afternoon.

* IMPACTS...Flooding of beaches that are normally dry, some
minor coastal erosion, and saltwater inundation of low-lying
roads, docks, boat ramps, and other coastal infrastructure.

* ADDITIONAL DETAILS...
Jun 14, 15:34Jun 15, 05:00
High Surf Warning
Location: Niihau; Kauai Southwest; Waianae Coast; Kahoolawe; Maui Leeward West; Kona; Kohala; Kauai South; East Honolulu; Honolulu Metro; Ewa Plain; Molokai Southeast; Molokai Leeward South; Lanai Leeward; Lanai South; Maui Central Valley South; Kipahulu; South Maui/Upcountry; South Haleakala; Big Island South; Big Island Southeast
Severity: Moderate
Description: ...HIGH SURF WARNING FOR SOUTH FACING SHORES OF ALL HAWAIIAN
ISLANDS THROUGH TUESDAY MORNING...
...COASTAL FLOODING DURING HIGH TIDES THROUGH TUESDAY...

.The combination of a large long-period south-southwest
(200 degree) swell and King Tides will cause significant wave up
and could cause widespread coastal flooding during the afternoon
high tides along south facing shores. Also due to the highest
monthly tides and water levels running higher than predicted at
select areas, flooding along all shorelines and in low-lying
coastal areas are expected especially during the late afternoon
and early evening hours.

* WHAT...For the High Surf Warning, dangerously large breaking
waves of 10 to 15 feet. Significant wave run up expected
during the peak high tide during the afternoons. For the
Coastal Flood Statement, isolated minor coastal flooding.

* WHERE...South facing shores of all Hawaiian Islands.
Vulnerable low-lying coastal roadways, docks, boat ramps and
other coastal infrastructure.

* WHEN...For the High Surf Warning, until 6 AM HST Tuesday. For
the Coastal Flood Statement, through Tuesday afternoon.

* IMPACTS...High. Expect very strong breaking waves and powerful
currents. Waves breaking in channel entrances may make
navigating the channels dangerous. Flooding of beaches that
are normally dry, minor coastal erosion, and saltwater
inundation.

* ADDITIONAL DETAILS...The combination of the south-southwest
swell and King Tides over the next couple of days will result
in more widespread coastal shore impacts, particularly during
the afternoon and evening peak daily tide.
Jun 14, 15:34Jun 15, 05:00
Coastal Flood Statement
Location: Niihau; Kauai Southwest; Waianae Coast; Kahoolawe; Maui Leeward West; Kona; Kohala; Kauai South; East Honolulu; Honolulu Metro; Ewa Plain; Molokai Southeast; Molokai Leeward South; Lanai Leeward; Lanai South; Maui Central Valley South; Kipahulu; South Maui/Upcountry; South Haleakala; Big Island South; Big Island Southeast
Severity: Minor
Description: ...HIGH SURF WARNING FOR SOUTH FACING SHORES OF ALL HAWAIIAN
ISLANDS THROUGH TUESDAY MORNING...
...COASTAL FLOODING DURING HIGH TIDES THROUGH TUESDAY...

.The combination of a large long-period south-southwest
(200 degree) swell and King Tides will cause significant wave up
and could cause widespread coastal flooding during the afternoon
high tides along south facing shores. Also due to the highest
monthly tides and water levels running higher than predicted at
select areas, flooding along all shorelines and in low-lying
coastal areas are expected especially during the late afternoon
and early evening hours.

* WHAT...For the High Surf Warning, dangerously large breaking
waves of 10 to 15 feet. Significant wave run up expected
during the peak high tide during the afternoons. For the
Coastal Flood Statement, isolated minor coastal flooding.

* WHERE...South facing shores of all Hawaiian Islands.
Vulnerable low-lying coastal roadways, docks, boat ramps and
other coastal infrastructure.

* WHEN...For the High Surf Warning, until 6 AM HST Tuesday. For
the Coastal Flood Statement, through Tuesday afternoon.

* IMPACTS...High. Expect very strong breaking waves and powerful
currents. Waves breaking in channel entrances may make
navigating the channels dangerous. Flooding of beaches that
are normally dry, minor coastal erosion, and saltwater
inundation.

* ADDITIONAL DETAILS...The combination of the south-southwest
swell and King Tides over the next couple of days will result
in more widespread coastal shore impacts, particularly during
the afternoon and evening peak daily tide.
Jun 14, 15:34Jun 15, 05:00
Coastal Flood Statement
Location: Niihau; Kauai Southwest; Waianae Coast; Kahoolawe; Maui Leeward West; Kona; Kohala; Kauai South; East Honolulu; Honolulu Metro; Ewa Plain; Molokai Southeast; Molokai Leeward South; Lanai Leeward; Lanai South; Maui Central Valley South; Kipahulu; South Maui/Upcountry; South Haleakala; Big Island South; Big Island Southeast
Severity: Minor
Description: ...HIGH SURF WARNING FOR SOUTH FACING SHORES OF ALL HAWAIIAN
ISLANDS THROUGH TUESDAY MORNING...
...COASTAL FLOODING DURING HIGH TIDES THROUGH TUESDAY...

.The combination of a large long-period south-southwest (200
degree) swell and King Tides will cause significant wave up and
could cause widespread coastal flooding during the afternoon high
tides. Also due to the highest monthly tides and water levels
running higher than predicted at select areas, flooding along all
shorelines and in low-lying coastal areas are expected especially
during the late afternoon and early evening hours.

* WHAT...For the High Surf Warning, dangerously large breaking
waves of 10 to 15 feet. Significant wave run up expected during
the peak high tide during the afternoons. For the Coastal Flood
Statement, isolated minor coastal flooding.

* WHERE...South facing shores of all Hawaiian Islands. Vulnerable
low-lying coastal roadways, docks, boat ramps and other coastal
infrastructure.

* WHEN...For the High Surf Warning, until 6 AM HST Tuesday. For
the Coastal Flood Statement, through Tuesday afternoon.

* IMPACTS...High. Expect very strong breaking waves and powerful
currents. Waves breaking in channel entrances may make
navigating the channels dangerous. Flooding of beaches that are
normally dry, minor coastal erosion, and saltwater inundation.

* ADDITIONAL DETAILS...The combination of the south-southwest
swell and King Tides over the next couple of days will result in
more widespread coastal shore impacts, particularly during the
afternoon and evening peak daily tide.
Jun 14, 09:54Jun 14, 23:00
High Surf Advisory
Location: Niihau; Kauai Southwest; Waianae Coast; Kahoolawe; Maui Leeward West; Kona; Kohala; Kauai South; East Honolulu; Honolulu Metro; Ewa Plain; Molokai Southeast; Molokai Leeward South; Lanai Leeward; Lanai South; Maui Central Valley South; Kipahulu; South Maui/Upcountry; South Haleakala; Big Island South; Big Island Southeast
Severity: Minor
Description: The High Surf Advisory has been replaced. Please see the latest information from NWS Honolulu HI on this developing situation.
Jun 14, 09:54Jun 14, 10:09

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 O\u02BBahu are sent. No ads or unrelated notifications.
Which islands are covered?
Currently, only alerts for the island of O\u02BBahu 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 \u2014 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.