Typhoons cause a wide range of damage, from torn-off roofs and flooded streets to contaminated drinking water and destroyed crops. The specific toll depends on wind speed, storm surge height, and rainfall volume, but most typhoons inflict some combination of structural, agricultural, infrastructure, and health-related damage. Here’s what each of those looks like in practice.
Wind Damage to Buildings
Wind is the most visible source of destruction, and the damage scales sharply with speed. At 74 to 95 mph, a typhoon strips shingles, vinyl siding, and gutters from well-built homes. Large tree branches snap, and shallowly rooted trees topple. Once winds reach 96 to 110 mph, the damage jumps to major roof and siding loss on well-constructed frame houses, with uprooted trees blocking roads across wide areas.
At 111 to 129 mph, entire sections of roof decking can be peeled away, and gable ends (the triangular wall sections under the roof peak) may collapse. At 130 to 156 mph, most of the roof structure is gone, and some exterior walls fail. Above 157 mph, a high percentage of framed homes are simply destroyed, with total roof failure and wall collapse. The jump between each tier is not gradual. A storm 20 mph stronger can mean the difference between repairable damage and a home that’s no longer standing.
Storm Surge and Coastal Erosion
Storm surge is often the deadliest part of a typhoon. When low atmospheric pressure and powerful winds push ocean water inland, the resulting wall of seawater can reach well above normal tide levels and travel far from the coast. Buildings, roads, and bridges in the surge zone can be swept off their foundations entirely. In the United States alone, coastal erosion from storms accounts for roughly $500 million per year in property loss.
A single severe storm can strip away wide beaches and substantial sand dunes in a matter of hours. In heavily populated coastal areas, even one or two feet of erosion can be catastrophic, undermining building foundations and destroying seawalls. The combination of storm surge arriving at high tide, layered with powerful waves, creates the most damaging conditions for any coastline.
Flooding and Freshwater Damage
Typhoons can dump enormous amounts of rain in a short period, overwhelming rivers, drainage systems, and reservoirs. Inland flooding often reaches areas far from the coast that residents don’t associate with typhoon risk. Floodwaters enter homes and businesses at ground level, destroying flooring, drywall, electrical systems, and appliances. Vehicles stall and are swept away. Landslides triggered by saturated hillsides bury roads and homes, particularly in mountainous regions common across typhoon-prone areas in East and Southeast Asia.
Power and Infrastructure Failures
The primary cause of power outages during a typhoon is damage to distribution lines, the local poles and wires that carry electricity to homes. Trees and debris snap poles, down lines, and short out transformers. Research on typhoon-affected power grids shows that higher maximum wind speeds correlate directly with longer recovery times. A moderate typhoon may knock out power for days, while an extreme event can leave areas without electricity for weeks to months. Damage to long-distance transmission lines takes even longer to repair because crews must work across remote, often debris-covered terrain.
Communication networks fail in parallel. Cell towers lose power or sustain structural damage, cutting off the ability to coordinate rescue efforts and reach emergency services. Water treatment plants and pumping stations go offline, compounding the crisis.
Contaminated Drinking Water
One of the most dangerous and overlooked forms of typhoon damage is what happens to the water supply. When a typhoon destroys sanitation facilities, human waste and sewage scatter across the landscape and seep into wells, reservoirs, and piped water systems. After Typhoon Haiyan struck the Philippines, testing found that 44% of water samples were contaminated with fecal bacteria three weeks after the storm. Ten months later, the situation had actually worsened: 65% of samples tested positive.
Contamination was found at every stage of the water supply, from the source, to storage tanks, to distribution pipes. Within three weeks, 105 cases of gastroenteritis were identified in one province, linked directly to contaminated water. Diseases like cholera, dysentery, and typhoid fever are all associated with this kind of contamination. After Haiyan, millions of people were potentially drinking fecally contaminated water for close to a year.
Crop and Soil Damage
Typhoons destroy crops through three mechanisms: wind, flooding, and salt. High winds flatten rice paddies, strip fruit from trees, and shred leafy crops. Flooding drowns root systems and washes away topsoil. But saltwater intrusion may cause the most lasting harm.
When storm surge pushes seawater inland over farmland, sodium and chloride ions accumulate in plant tissues and become toxic. Salt also creates a “chemical drought,” where water actually flows out of plant roots into the saltier surrounding soil, dehydrating the plant even in waterlogged conditions. Severe salt spray can kill plant buds outright. Crops that are actively growing at the time of the storm suffer the most, while those near the end of their life cycle fare somewhat better.
The soil itself can be damaged for seasons afterward. Sodium from seawater causes clay-heavy soils to break apart and form dense, compacted layers that resist drainage and root growth. Farmers may need to flush fields repeatedly before the land is productive again.
Injuries and Deaths
Drowning and traumatic injuries from flying or collapsing debris are the leading direct causes of death during a typhoon. A multi-country study published in The BMJ found that injury-related mortality peaks in the first week after a cyclone and drops substantially within two weeks. Perhaps surprisingly, the single highest spike in post-typhoon deaths comes from kidney-related causes, with a 92% increase in the two weeks following a storm. This likely reflects dehydration, limited access to dialysis and medication, and the physical stress of the event on people with pre-existing kidney conditions.
Mental Health Effects
The psychological toll of a typhoon extends well beyond the storm itself. A study of survivors in Vietnam found that about 12.5% met the criteria for at least one mental health disorder after a typhoon. Panic disorder was the most common at 9.3%, followed by major depression at 5.9%, post-traumatic stress disorder at 2.6%, and generalized anxiety at 2.2%. Among those diagnosed, 70% had a single disorder, but 30% were dealing with two or more conditions simultaneously. Loss of a home, displacement, grief, and the prolonged stress of recovery all contribute to these outcomes, and they can persist long after the physical rebuilding is finished.