Press Release - Flood Advisory in Effect for Guam; Heavy Rainfall Expected Next Week


Press Release - Flood Advisory in Effect for Guam; Heavy Rainfall Expected Next Week

Flood Advisory in Effect for Guam; Heavy Rainfall Expected Next Week


The National Weather Service (NWS) Guam Weather Forecast Office issued a flood advisory for Guam, in effect until 2:15 p.m. this afternoon. Urban and small stream flooding caused by excessive rainfall is expected. Between 0.5 and 1 inch of rain has fallen. Additional rainfall amounts of 1 to 2 inches is expected, resulting in minor flooding.


Some locations that will experience impact include Dededo, Tamuning, Yigo, Mangilao, Chalan Pago-Ordot, Barrigada, Yona, Hagatna Heights, Andersen AFB, Talofofo, Mongmong-Toto-Maite, Sinajana, Asan, Piti, and Santa Rita.


Residents and visitors are advised to take the following precautionary actions:

  • If driving, be alert for low visibilities and slippery roads in heavy rain;
  • Slow down where water is ponding on the road;
  • Turn Around, Don’t Drown. Avoid walking or driving through flood waters. Just 6 inches of moving water can knock you down, and 2 feet of water can sweep your vehicle away;
  • Do not camp, park, or hike along streams, rivers, and creeks during heavy rainfall. These areas can flood quickly and with little warning.

hydrologic outlook is issued for Guam, Rota, Tinian, and Saipan. A tropical circulation has formed a little north of the CNMI. The system is forecast to slowly strengthen, as it gradually heads off to the west, while placing the Marianas in a monsoon flow for the middle to end of the upcoming week. There is still some uncertainty in the timing, location, and duration of the heavier rainfall potential. Stay up to date with the latest information in the coming week.

The Offices of Guam Homeland Security and Civil Defense (GHS/OCD) advise the community to practice caution while traveling in rainy conditions, driving below the speed limit and allowing enough braking distance between vehicles.


Visit the following links for the latest advisory information:


For more information, contact GHS/OCD Public Information Officer Jenna G. Blas at (671) 489-2540 or via email at



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June 2018 is Typhoon Preparedness Month