Typhoon & Weather Safety in Guam

Guam uses a unique Tropical Cyclone Condition of Readiness (TCCOR) system to warn residents and visitors of approaching storms. Monitor TCCOR levels from the moment you hear of any storm in the region.

• TCCOR 4: Destructive winds (50+ mph) possible within 72 hours. Begin preparations.
• TCCOR 3: Destructive winds possible within 48 hours. Complete preparations, secure outdoor items.
• TCCOR 2: Destructive winds possible within 24 hours. Secure all outdoor items; confirm shelter plans.
• TCCOR 1: Destructive winds expected within 12 hours. Shelter in place immediately — do not drive.
• TCCOR 1E: Winds are currently occurring. Stay sheltered — do not go outside under any circumstances.
• All-Clear: The storm has passed. Wait for official confirmation before going outdoors.

Prepare your 72-hour emergency kit and secure your accommodation as soon as TCCOR 3 or higher is declared.

• Water: store at least 1 gallon per person per day for 3 days minimum. Fill bathtub as backup.
• Food: non-perishable items (canned goods, crackers, dried fruit, peanut butter) for 3+ days.
• Light sources: flashlights, extra batteries, battery-powered lanterns. Never use candles near gas lines.
• Medications: 7-day supply of any prescription medications stored safely.
• Charge all devices (phones, power banks) before TCCOR 1 is declared.
• Identify your nearest government emergency evacuation shelter before typhoon season.
• Secure or bring indoors all outdoor furniture, umbrellas, potted plants, and loose items.
• Close and latch all windows and shutters. If no shutters: stay away from windows during the storm.
• Keep important documents (passport, travel insurance) in a waterproof bag.
• If staying in a mobile home or temporary structure: evacuate to a solid building or shelter before TCCOR 1.

• Stay indoors in the strongest part of the building — an interior room away from windows.
• Do NOT go outside for any reason during TCCOR 1 or 1E — even in the apparent calm of the eye.
• Do NOT drive during a typhoon — roads flood rapidly and wind can overturn vehicles.
• If in a high-rise hotel: move to a lower floor (floors 3–10) away from windows for the safest shelter.
• If power goes out: use battery-powered lights. Keep a torch near your bed.
• If flooding begins in your room: move to a higher floor immediately; do not wait.
• Monitor KGUM Radio 567 AM for emergency updates if internet and power are out.

• Wait for the official all-clear from the Guam Governor's Office before going outside.
• Treat ALL downed power lines as live — stay well away and report to Guam Power Authority.
• Do not drink tap water until Guam Waterworks Authority (GWA) issues a formal safe-water notice.
• Wear closed-toe shoes when going outdoors — broken glass, nails, and debris are everywhere.
• Watch for flooding in low-lying areas — roads may be submerged even after the storm passes.
• Check in with your hotel, airline, and travel insurance provider about delays or damage.
• Report any structural damage to your accommodation to staff immediately.

• A.B. Won Pat International Airport (GUM) closes during TCCOR 2 and higher — all flights cancelled.
• Contact your airline at first sign of a TCCOR 2 warning to discuss rebooking options.
• Travel insurance: ensure your policy covers typhoon-related cancellations and medical emergencies.
• Hotel stays: most Guam hotels are built to typhoon standards and serve as de-facto shelters.
• Tours and activities: all outdoor activities cancel during TCCOR 3 and above.