Guam: Disruptions due to Typhoon Mawar ongoing across Guam as of May 26

Event

Disruptions are ongoing across Guam as of May 26, following the passing of Typhoon Mawar. The center of the storm passed through the Rota Channel between Guam and Rota Islands late May 24.

Authorities have stated that Antonio B. Won Pat International Airport (GUM) is likely to be closed through at least May 30 due to flooding. The airport remains open to humanitarian and essential cargo operations. Main roads remain passable. Most of Guam was without power during the passage of the storm, except for around 1,000 people in parts of the north serviced by underground transmission lines; restoration and repair efforts are underway. Officials have issued low to no water notices due to the impact on the water system; a cautionary boil water notice is also in place

Flood watches are in place over Guam through early May 27; flash flooding due to excessive rainfall remains possible. Authorities have stated that clean-up efforts could take weeks. In advance of the storm, authorities declared a state of emergency in Guam May 22, and President Biden approved an emergency declaration for the Northern Mariana Islands and Guam on May 23 to allow for additional resources and assistance due to the potential impacts of the storms.

Protracted transport and business disruptions are almost certain in affected areas as emergency crews continue recovery efforts; utility disruptions will probably occur over the coming days and weeks. Shortages of fuel and other essential goods are likely. Driving conditions may be difficult on rural routes and regional highways.

Stagnant pools of water during and after flooding may increase the incidence of insect-borne and waterborne diseases, such as dengue fever, cholera, and malaria. Exposure to raw sewage and other hazardous materials mixed with floodwaters poses a serious health threat.

Advice

Monitor local media for updates and advisories on weather conditions. Make allowances for possible supply chain disruptions in affected areas. Do not drive on flooded roads. Use extreme caution in low-lying areas and near streams, creeks, and other waterways due to the potential for flooding. Seek updated information on road conditions before driving or routing shipments through areas where flooding has occurred. Confirm flights before checking out of hotels or driving to the airport; clearing passenger backlogs may take several days in some locations. Prepare for possible communication disruptions, including mobile phone and internet services.

Observe strict food and water precautions, as municipalities could issue boil-water advisories following flooding events. Take precautions against insect-borne and waterborne diseases in the coming days. Review contingency plans and be prepared to move quickly to shelters if evacuation orders are issued. Charge battery-powered devices in the case of prolonged electricity outages.