Guam Homeland Security - Office of Civil Defense

X Flooding is a temporary overflowing of water onto land that is normally dry. Flooding may happen with only a few inches of water, or it may cover a house to the rooftop. There are many possible causes of floods including heavy rain, coastal storms and storm surge, waterway overflow from being blocked with debris, or overflow of levees, dams, or waste water systems. Flooding can occur slowly over many days or happen very quickly with little or no warning, called flash floods.

To learn more, visit https://www.ready.gov/floods

Wildfire

Regularly clean the roof and gutters.
Maintain an area approximately 30’ away from you home that is free of anything that will burn, such as wood piles, dried leaves, newspapers and other brush.
Connect garden hoses long enough to reach any area of the home and fill garbage cans, tubs, or other large containers with water.
Review your homeowner's insurance policy and also prepare/update a list of your home's contents.

Fire Weather

Turn on your TV/radio. You’ll get the latest weather updates and emergency instructions.
Know where to go. If you are ordered to evacuate, know the route to take and have plan of where you will go. Check-in with your friends and family.
Keep your car fueled, in good condition, and stocked with emergency supplies and a change of clothes.

Drought

Conserve water

Take shorter showers.

Turn off the water while brushing your teeth or shaving.
Run the washer less frequently and only when you have a full load.
Water your lawn less frequently and do so when the temperature is cooler in the early morning or late evening.
When you run the tap to heat or cool water, keep a pitcher to store the water and use it to water plants.
Avoid washing your car.

Practice fire prevention

Don't set off fireworks when conditions are dry.
Deposit cigarette butts in the proper receptacle to avoid starting a
Pour water over camp fires and backyard fire pits to ensure they are completely out before leaving them unattended.

Follow directions from local officials. If there are restrictions on water usage, be sure to heed them.

To learn more, visit https://www.ready.gov/wildfires and https://www.ready.gov/drought

X
Typhoons/Hurricanes are massive storm systems that form over the water and move toward land. Threats from typhoons/hurricanes include high winds, heavy rainfall, storm surge, coastal and inland flooding, and rip currents.

“Hurricanes” form in the Atlantic Northeast Pacific region and “Typhoons” form in the Northwest Pacific Region. These large storms are call cyclones in other parts of the world.

To learn more, visit https://www.ready.gov/hurricanes.

6:00 P.M. Advisories in Effect; Hazardous Surf and Seas Remain

The National Weather Service (NWS) Weather Forecast Office Guam has the following advisories in effect:

A high surf advisory remains in effect for Guam, Rota, Tinian, and Saipan until 4 p.m. Tuesday. Large breaking waves of 7 to 10 feet are expected for north facing reefs of the Marianas. Dangerous swimming and surfing conditions and localized beach erosion are expected. Inexperienced swimmers should remain out of the water due to dangerous surf conditions.

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6:50 a.m Earthquake Recorded

The U.S. Geological Survey recorded an earthquake with a preliminary magnitude of 4.9 that struck 64 km NE of Yigo Village, Guam with a depth of 129.0 km, at 4:02 a.m. (ChST).

As advised by the Pacific Tsunami Warning Center, there is no tsunami threat to the Marianas from the earthquake. There were no major damages or injuries reported from the earthquake.

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No Tsunami Threat to Marianas from Philippines Earthquake

The U.S. Geological Survey recorded an earthquake with a preliminary magnitude of 6.4 that occurred 27 km E of Santiago, Philippines, with a depth of 58.5 km, at 1:02 p.m. (ChST).

As advised by the Pacific Tsunami Warning Center, there is no tsunami threat to Guam and the CNMI from this earthquake.

This will be the final statement issued by GHS/OCD unless additional information is received.

Read more about No Tsunami Threat to Marianas from Philippines Earthquake

Earthquake Recorded

The U.S. Geological Survey recorded an earthquake with a preliminary magnitude of 5.2 that struck 182 km SSW of Merizo Village, Guam, with a depth of 10.0 km, at 5:01 p.m. (ChST).

As advised by the Pacific Tsunami Warning Center, there is no tsunami threat to the Marianas from the earthquake. There were no major damages or injuries for Guam reported from the earthquake.

The Offices of Guam Homeland Security and Civil Defense remind the community that when an earthquake strikes, conduct the earthquake procedure, “Drop, Cover and Hold On” until the shaking stops.

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OHS-OCD Hosts ICS 300 & 400 Training Opportunities

The Office of Homeland Security and the Office of Civil Defense (OHS-OCD), in coordination with the Port Authority of Guam (PAG), will host two Incident Command System (ICS) training opportunities at the PAG Training Room, Piti. The courses follow:

Read more about OHS-OCD Hosts ICS 300 & 400 Training Opportunities

9:30 a.m. GHS/OCD, NBG, and AAFB to Conduct Routine Testing of Advanced Warning Systems

The Offices of Guam Homeland Security and Civil Defense (GHS/OCD), U.S. Naval Base Guam (NBG), and Andersen Air Force Base (AAFB) will conduct routine testing of the vital communication and advance warning system sirens, respectively, on Tuesday, January 6, 2026, starting at 3:15 p.m.

GHS/OCD will test the All Hazards Alert Warning System (AHAWS) sirens in conjunction with NBG and AAFB monthly routine testing of the “Giant Voice (GV)” sirens.

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12:15 a.m. Earthquake Recorded

The U.S. Geological Survey recorded an earthquake with a preliminary magnitude of 5.0 that struck 24 km S of Merizo Village, Guam with a depth of 50.6 km, at 11:33 p.m., December 24, 2025 (ChST).

As advised by the Pacific Tsunami Warning Center, there is no tsunami threat to the Marianas from the earthquake. There were no major damages or injuries reported from the earthquake.

Read more about 12:15 a.m. Earthquake Recorded

4:45 a.m. Flood Warning in Effect for Guam

The National Weather Service (NWS) Guam Weather Forecast Office issued a flash flood warning, in effect for central and southern Guam.

Up to 1.5 inches of rain has already fallen. Additional rainfall amounts of 2 to 3 inches are possible for the area. Flash flooding is ongoing or expected to begin shortly.

The community is advised to take the following precautionary actions:.

Read more about 4:45 a.m. Flood Warning in Effect for Guam

4:05 a.m. Flood Advisory in Effect for Guam; Practice Caution

The National Weather Service (NWS) Guam Weather Forecast Office issued a flood advisory for Guam until 9:30 a.m. this morning. Up to 1 inch of rain has fallen. Additional rainfall of 1 to 4 inches are expected resulting in minor flooding.

The community is advised to take the following precautionary actions:.

Read more about 4:05 a.m. Flood Advisory in Effect for Guam; Practice Caution

11:05 a.m. Flood Advisory in Effect for Guam; Hazardous Surf and Seas Remain

The National Weather Service (NWS) Guam Weather Forecast Office issued a flood advisory, in effect for Guam until noon today. Between a half and 1.5 inches of rain have fallen. Additional rainfall of 1 to 2 inches are expected. The community is advised to take the following precautionary actions:.

Read more about 11:05 a.m. Flood Advisory in Effect for Guam; Hazardous Surf and Seas Remain

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Wildfire

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Drought

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Department of Homeland Security (DHS) Definition of Terrorism

June 2018 is Typhoon Preparedness Month

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