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Hurricanes, cyclones, and typhoons: emergency response and survival

Hurricanes, typhoons, and tropical cyclones are massive, rotating cyclonic storm systems characterized by dangerous oceanic storm surges, catastrophic sustained winds exceeding 250 kilometers per hour (155 miles per hour), torrential inland rainfall, and localized tornadoes. While meteorologists use different regional terminology (hurricanes in the North Atlantic and Northeast Pacific, typhoons in the Northwest Pacific, and cyclones in the South Pacific and Indian Ocean), they represent the same destructive atmospheric phenomenon.

Surviving a major tropical storm requires recognizing your geographic vulnerabilities, obeying official evacuation orders without hesitation, securing physical structures before gale-force winds arrive, and safely riding out the eyewall.

For comprehensive storm tracking, interactive hurricane preparation checklists, and regional hurricane guides, visit our dedicated sister site hurricane.guide.

Do this now: urgent hurricane response checklist

When a tropical storm or hurricane warning is issued for your area:

  1. Obey all official evacuation directives immediately: If local emergency management authorities issue an evacuation order for your evacuation zone, leave without delay. Do not wait for the storm to begin.
  2. Identify your storm surge evacuation zone: Check municipal or county evacuation maps. Evacuation zones are determined by coastal elevation and storm surge risk, not wind speed.
  3. Board up windows with exterior storm shutters or plywood: Install certified storm shutters or pre-cut 16 mm (⅝-inch) exterior-grade plywood panels secured with heavy-duty barrel bolts or masonry screws. Never apply tape to window glass; tape does not prevent glass breakage and produces giant, lethal flying glass shards.
  4. Bring all outdoor items indoors: High winds transform loose garden furniture, metal trash bins, potted plants, gas grills, and garden tools into airborne missiles that easily puncture exterior walls and roofs.
  5. Fill all vehicle fuel tanks and portable fuel cans: Gasoline stations lose electrical power or run out of fuel rapidly as thousands of evacuees take to the roads.
  6. Stock a seven-day household emergency supply: Store at least 4 liters (1 gallon) of drinking water per person per day, non-perishable canned food, a manual can opener, essential prescription medications, a battery-powered weather radio, and portable power banks.

Storm surge: the deadliest hurricane threat

Storm surge is the abnormal, rapid rise of ocean seawater driven ashore by the immense pressure and atmospheric wind fields of a cyclonic storm:

  • The primary cause of hurricane fatalities: Approximately 90 percent of all direct hurricane-related deaths are caused by water, primarily storm surge and coastal flooding, rather than high winds.
  • Speed of surge onset: Storm surge is not an ordinary rising tide; it is a powerful wall of turbulent ocean water that can surge inland several kilometers within minutes, submerging single-story homes to the rooflines.
  • Wave action and structural destruction: Battering waves ride atop the surge, striking foundation walls with thousands of pounds of hydrostatic pressure per square meter. Ordinary residential wood-frame construction cannot withstand combined hydrodynamic surge and breaking wave impacts.
  • Vertical evacuation limitations: Sheltering on the second floor or attic of a beachfront or low-lying home in a storm surge zone is extremely dangerous. If the home collapes into the storm surge, occupants drown. Attics also trap victims if rising water fills the upper level without a roof exit.

High wind structural sheltering

If your home is located outside all flood and storm surge evacuation zones, your structure is built to modern hurricane wind codes, and authorities have not ordered an evacuation, shelter indoors using these protocols:

  • Retreat to a windowless interior room: Seek shelter in a small interior room, hallway, bathroom, or closet on the lowest floor above potential localized flooding. Put as many sturdy walls between yourself and the exterior as possible.
  • Protect yourself under sturdy furniture: Bring mattress pads, thick sleeping bags, or heavy blankets into your interior shelter space to shield your body from collapsing drywall or airborne roof debris.
  • Wear helmets: Put on bicycle, motorcycle, or construction helmets for everyone in your household. Head trauma from airborne debris is a major cause of serious injury during structural failures.
  • Never open windows to balance pressure: An old urban myth claims that opening windows balances barometric pressure during a hurricane. Opening windows allows gale-force winds to enter the home, creating an intense upward aerodynamic lift that rips roof trusses off the walls. Keep all exterior windows and doors tightly latched.

The dangerous illusion of the storm eye

If the center of a hurricane or typhoon passes directly over your community, you will experience the calm eye:

  • Sudden atmospheric calm: Heavy rain ceases, the sky may clear, and winds drop to near calm within minutes.
  • Do NOT go outside: The storm is not over. The eye is simply the tranquil center of the atmospheric cyclone.
  • The violent eyewall return: Depending on the size and forward speed of the hurricane, the eye may last anywhere from a few minutes to an hour. Once the backside of the eyewall arrives, violent hurricane-force winds will resume suddenly from the exact opposite direction.
  • Structural compromise: Trees, fences, and roofs that were weakened by the first half of the storm are frequently blown down by the sudden reversal of gale-force winds during the second half. Stay inside your safe room until official National Weather Service bulletins confirm that the entire storm system has moved past.

Inland flooding and localized tornadoes

Hurricanes do not stop at the coastline. Weakening tropical systems carry enormous volumes of atmospheric moisture hundreds of kilometers inland:

  • Catastrophic inland flash flooding: Stalled tropical depressions can drop 50 to 100 centimeters (20 to 40 inches) of rain over mountain ranges and river basins, causing catastrophic river flooding, mudslides, and flash flooding days after coastal landfall.
  • Embedded tornadoes: Tropical cyclones frequently spawn intense, fast-moving tornadoes in their outer rain bands, typically on the front-right quadrant of the storm. These tornadoes often occur with little to no advance warning and strike in darkness.
  • Turn around, do not drown: Never drive across flooded roadways. As little as 30 centimeters (12 inches) of moving water can float a passenger vehicle, sweeping it into deep drainage culverts or swollen rivers.

Immediate aftermath and emergency safety

The hours following a storm present extreme hazards that claim lives:

  • Avoid downed power lines: Treat every downed utility wire as an energized, lethal high-voltage line. Keep at least 10 meters (30 feet) away and never walk through standing water near fallen wires.
  • Operate generators outdoors only: Never run an engine-driven generator inside a home, garage, or enclosed porch. Keep generators at least 6 meters (20 feet) away from all windows, doors, and vents to prevent carbon monoxide poisoning.
  • Boil water: Assume tap water supplies are compromised by broken water mains or floodwater infiltration. Boil all water vigorously for at least one full minute before drinking or cooking.

For complete, detailed instructions on safely cleaning your home, mucking out flood damage, preventing mold, and filing insurance and disaster relief claims, see our dedicated guide on Storm and hurricane cleanup and recovery and visit our sister site hurricane.guide.