Guam Homeland Security/Office of Civil Defense

04/09/2026

Lieutenant Governor Joshua Tenorio today signed a proclamation declaring September as National Preparedness Month on Guam — officially kicking off a monthlong effort to help island families get ready for typhoons, earthquakes, and other emergencies.

This year's national theme says it all: Americans Stand Ready.

Being ready comes down to four simple actions every household can take:
📋 Make a Plan
🎒 Build a Kit
📢 Know Your Alerts
🤝 Get Involved

"National Preparedness Month reminds us that readiness begins at home, with each of us," said Homeland Security Advisor Esther J. C. Aguigui. "Guam faces real threats — from typhoons to earthquakes to other emergencies — and the good news is that simple steps taken today make our families and our island more ready."

All month long, we'll be sharing island-specific tips to help you and your family prepare. You can start building your family plan right now with the free, fillable form at ready.gov/plan.

📅 Mark your calendar: our Grand Finale Preparedness Fair is Saturday, Sept. 19, from 10 AM–2 PM at the Micronesia Mall Center Court.

Follow along all September. When we prepare together, we stand ready together.

Photo courtesy of the Office of the Governor of Guam.

04/09/2026

02/09/2026

🌊 High Surf Advisory & High Rip Current Risk Remain in Effect for Guam

A National Weather Service High Surf Advisory and High Rip Current Risk remain in effect for west-facing reefs of the Marianas. A monsoon surge will bring large swells from the southwest to the northwest, causing surf and rip currents to become hazardous. Surf may be slightly higher for Guam than the CNMI.

⏰ High Surf Advisory: in effect until 4 PM ChST Friday, Sept. 4
⏰ High Rip Current Risk: through Friday afternoon

What to expect:
🌊 Large breaking waves of 8–10 feet in the surf zone along west-facing reefs
⚠️ Dangerous rip currents
🏄 Dangerous swimming and surfing conditions, plus localized beach erosion
❗ Rip currents can sweep even the best swimmers away from shore into deeper water

⚠️ Rip currents will be life-threatening. What you can do:
🚫 Inexperienced swimmers should stay out of the water due to dangerous surf.
🌊 If caught in a rip current, relax and float. Don't swim against the current. If able, swim following the shoreline. If you can't escape, face the shore and call or wave for help.
📲 Monitor updates from NWS Tiyan and GHS/OCD.

GHS/OCD continues to monitor conditions in coordination with NWS Tiyan.

🔗 NWS Tiyan: weather.gov/gum
🔗 GHS/OCD: ghs.guam.gov

US Dept of Commerce National Oceanic and Atmospheric Administration National Weather Service Tiyan, GU 3232 Hueneme Rd Barrigada, GU 96913 (671) 472-0900 Comments? Questions? Please Contact Us.

02/09/2026

🌧️ Heavy Showers & Gusty Winds Possible Through Thursday Night

The National Weather Service in Tiyan is tracking a large, disorganized tropical disturbance northeast of Saipan, expected to move just north of the Marianas over the next day. Guam is more likely to receive the heavier showers and stronger winds.

Here's what to expect, starting tonight:
💨 Sustained winds of 15–25 mph, with gusts to 30 mph
🌧️ Locally heavy showers and isolated thunderstorms
⚠️ A potential flooding risk as heavy showers develop

There's still high uncertainty on exactly where the heaviest rain will fall, and there may be breaks between periods of heavy rainfall.

What you can do:
🚗 Don't drive through flooded roadways. Turn Around, Don't Drown — most flood deaths occur in vehicles.
🪟 Secure loose outdoor items that can be moved by gusty winds.
📲 Monitor updates from NWS Tiyan and GHS/OCD.

GHS/OCD continues to monitor conditions in coordination with NWS Tiyan and will provide additional information as needed.

🔗 NWS Tiyan: weather.gov/gum
🔗 GHS/OCD: ghs.guam.gov

US Dept of Commerce National Oceanic and Atmospheric Administration National Weather Service Tiyan, GU 3232 Hueneme Rd Barrigada, GU 96913 (671) 472-0900 Comments? Questions? Please Contact Us.

01/09/2026

Håfa Adai, Guam! This week for National Preparedness Month, we're starting with step one: Make a Plan. 📋

Start by knowing which hazards can affect Guam — typhoons, earthquakes, tsunamis, flooding — because your plan should fit the threats we actually face. Then gather your household and talk through these questions together:

📢 How will we get alerts? Make sure someone in the house is set up to receive official warnings.
🏠 What's our shelter plan? Know where you'll ride out a storm — at home or at a designated shelter.
🛣️ What's our evacuation route? For tsunami or flooding, know how you'll get to higher ground or out of the area — and have a backup route.
📞 How will we stay in touch? Pick an off-island contact everyone can call or text, and choose two meeting spots — one near home, one outside the neighborhood.
👨‍👩‍👧 Who needs extra help? Plan ahead for children, elders, family members with disabilities, medications, and pets.

✍️ Write it down. Share it with everyone in the house. Practice it.

Make it easy on yourself — FEMA's fillable family plan is free at ready.gov/plan. Fill it in, print it, and keep a copy where everyone can find it.

A plan on paper beats a plan in your head every time. When we plan ahead, we stand ready.

🗓️ Grand Finale Preparedness Fair — Sat, Sept. 19, 10 AM–2 PM, Micronesia Mall Center Court. Free and family-friendly.

01/09/2026

Håfa Adai, Guam! 🇺🇸

September is National Preparedness Month, and this year's theme says it all: Americans Stand Ready.

Preparedness comes down to four actions every household can take:
✅ Make a Plan
✅ Build a Kit
✅ Know Your Alerts
✅ Get Involved

All month long, GHS/OCD will share simple, island-ready steps to help your family be prepared for whatever comes our way — from typhoons to earthquakes and everything in between.

📅 Mark your calendar: our Grand Finale Preparedness Fair is Saturday, Sept. 19, 10 AM–2 PM at Micronesia Mall Center Court. Family-friendly, free, and full of ways to get ready.

This week, we're starting where every prepared family starts: Make a Plan. Stay tuned — we'll show you how.

Follow along all September. When we prepare together, we stand ready together.

31/08/2026

The Offices of Guam Homeland Security and Civil Defense (GHS/OCD), U.S. Naval Base Guam, and Andersen Air Force Base will conduct the routine monthly test of the island's advanced warning sirens on Tuesday, September 1, 2026, at 3:15 p.m.

GHS/OCD will test the All Hazards Alert Warning System (AHAWS) sirens in conjunction with NBG and AAFB testing of the "Giant Voice" system.

Residents, visitors, and motorists near the sirens can expect to hear pre-scripted voice messaging announcing the start and end of the test, followed by sixty seconds of the "Alert" tone.

This is a routine test. No action is required.

Tests are conducted monthly, typically the first Tuesday of each month, unless it falls on an observed holiday.

For more information, call (671) 475-9600 or visit ghs.guam.gov. Si Yu'os Ma'åse'.

30/08/2026

25/08/2026

FLASH FLOOD WARNING IN EFFECT
7:00 am ChST - Wednesday, August 26, 2026

Flash Flood Warning now in effect for the southern half of Guam, now through 8:30 am ChST.

Heavy showers have dropped between 2 and 5 inches of rainfall across the southern half of Guam. Heavy showers are ongoing, and flash flooding of creeks, rivers, and low-lying roadways is now expected.

If encountering flooded streets, turn around, don't drown.

www.weather.gov/gum for all the latest weather forecasts and conditions.

25/08/2026

🌧️ Flood Advisory for Southern Guam — until 7:30 AM

Heavy rain from thunderstorms is causing urban and small stream flooding across southern Guam this morning. Expect minor flooding in low-lying and poor drainage areas, and some low-water crossings may become impassable.

Watch for flooding in: Mangilao, Chalan Pago-Ordot, Barrigada, Yona, Hagatna Heights, Talofofo, Mongmong-Toto-Maite, Sinajana, Inarajan, Asan, Merizo, Piti, Santa Rita, and Umatac.

🚗 If you hit a flooded road: turn around, don't drown. Most flood deaths happen in vehicles. Never drive through standing or moving water.

Latest from NWS: weather.gov/gum
GHS/OCD: ghs.guam.gov

US Dept of Commerce National Oceanic and Atmospheric Administration National Weather Service Tiyan, GU 3232 Hueneme Rd Barrigada, GU 96913 (671) 472-0900 Comments? Questions? Please Contact Us.