Press Release - Flood Advisory in Effect Until 430 pm


Press Release - Flood Advisory in Effect Until 430 pm

The National Weather Service (NWS) Guam Weather Forecast Office issued a flood advisory, in effect for Guam, until 4:30pm this afternoon. Urban and small stream flooding caused by excessive rainfall is expected. Minor flooding in low-lying and poor drainage areas. Water over roadways. 
Doppler radar indicated heavy showers and possible thunderstorms. This will cause urban and small stream flooding. Between 0.5 and 1 inch of rain has fallen. Additional rainfall amounts of 1 to 3 inches are expected over the area. This additional rain will result in minor flooding.

Initially central Guam will see the heaviest rainfall, spreading across the remainder of the island over the next couple of hours.

Residents and visitors are advised to take the following precautionary actions;
  • Turn around, don`t drown when encountering flooded roads. Most flood deaths occur in vehicles.
  • Be aware of your surroundings and do not drive on flooded roads.
  • In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain. Do not attempt to cross flooded roads. Find an alternate route.
  • Flooding is occurring or is imminent. It is important to know where you are relative to streams, rivers, or creeks which can become killers in heavy rains. Hikers especially should avoid streams and creeks.

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.

Please report observed flooding to local emergency services or law enforcement and request they pass this information to the National Weather Service when you can do so safely.

Visit the following links for the latest advisory information:
For more information, contact Acting Public Information Officer Stephen Cahill at (671) 489-9517 or via email at


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June 2018 is Typhoon Preparedness Month