Types of Emergencies in Hawaiʻi

Hawaiʻi faces a wide range of natural and man-made hazards. While many of these events are infrequent, their impacts can be significant—especially given the islands’ isolation and reliance on imported resources.

Understanding the types of emergencies that may occur, and the challenges they create, helps individuals and families prepare for disruptions before they happen.

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On This Page

• Hurricanes and Tropical Storms
• Flooding and Flash Floods
• Wildfires
• Earthquakes
• Tsunamis
• Volcanic Activity
• Power Outages
• Supply Chain Disruptions
• Civil Emergencies and Public Safety Incidents
• Why This Matters

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Hurricanes and Tropical Storms

Hawaiʻi’s hurricane season runs from June through November. While direct hits are relatively rare, storms frequently pass close enough to bring heavy rain, strong winds, rough seas, and dangerous conditions.

Potential Impacts

• Extended power outages
• Flooding and road closures
• Damage to homes and infrastructure
• Disruptions to shipping and air transport
• Limited access to fuel and supplies

Even a storm that does not make landfall can still cause major disruptions across the islands.

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Flooding and Flash Floods

Heavy rainfall can quickly overwhelm drainage systems, streams, and low-lying areas. Flash floods can develop rapidly with little warning, especially in valleys, urban areas, and near rivers and canals.

Potential Impacts

• Road closures and impassable routes
• Vehicle damage or loss
• Contaminated water systems
• Temporary isolation of neighborhoods
• Increased risk of injury or drowning

Flooding is one of the most common hazards in Hawaiʻi and can occur even outside of major storms.

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Wildfires

Wildfires are a serious and growing threat in Hawaiʻi. Dry conditions, strong winds, and invasive grasses can allow fires to spread rapidly and with little warning.

Potential Impacts

• Rapid evacuations with little warning
• Destruction of homes and communities
• Road closures limiting escape routes
• Loss of utilities and communications
• Long-term displacement of residents

Wildfires can escalate quickly, making advance planning especially important.

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Earthquakes

Hawaiʻi experiences regular seismic activity due to volcanic and geologic forces beneath the islands. Most earthquakes are minor, but larger events are possible.

Potential Impacts

• Structural damage to buildings
• Power outages
• Road and infrastructure damage
• Landslides in certain areas
• Possible tsunami generation

Even moderate earthquakes can disrupt utilities, transportation, and normal daily life.

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Tsunamis

Tsunamis can be generated by earthquakes occurring locally or across the Pacific. Hawaiʻi has a well-established warning system, but response times can vary depending on where the event originates.

Potential Impacts

• Coastal flooding and destruction
• Mandatory evacuations in low-lying areas
• Damage to harbors and coastal infrastructure
• Disruption of shipping and supply chains
• Dangerous conditions for anyone near the shoreline

Tsunamis are low-frequency but high-impact events that require immediate action when warnings are issued.

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Volcanic Activity

On the Island of Hawaiʻi, volcanic activity is an ongoing reality. Eruptions may produce lava flows, ash, and volcanic gases that affect health, access, and infrastructure.

Potential Impacts

• Property damage from lava flows
• Air quality issues from volcanic gases and vog
• Road closures and access restrictions
• Displacement of communities
• Health effects for people with respiratory conditions

Even when volcanic activity is not directly destructive, it can still affect health, travel, and daily routines.

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Power Outages

Power outages are one of the most common disruptions in Hawaiʻi and can result from storms, equipment failures, fires, traffic accidents, or other incidents.

Potential Impacts

• Loss of refrigeration and food spoilage
• Limited communications, including internet and cell service
• Inoperable traffic signals
• Disruption to water systems in some areas
• Closure of stores and gas stations

Even outages that last only a day or two can create major inconvenience and supply issues.

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Supply Chain Disruptions

Hawaiʻi depends heavily on imported goods. Disruptions to shipping, air cargo, ports, fuel delivery, or local transportation can quickly affect the availability of essential items.

Potential Impacts

• Empty store shelves
• Limited fuel availability
• Delays in medical supplies
• Increased prices for essential goods
• Reduced availability of household necessities

Even relatively short disruptions can create noticeable shortages across the islands.

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Civil Emergencies and Public Safety Incidents

While less common, events such as major accidents, hazardous material releases, infrastructure failures, or other public safety incidents can disrupt normal life and require immediate action.

Potential Impacts

• Road closures or restricted areas
• Shelter-in-place advisories
• Temporary disruption of services
• Increased demand on emergency responders
• Confusion caused by incomplete or fast-changing information

These incidents often require people to stay informed, remain calm, and follow official guidance.

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Why This Matters

Each of these emergencies presents different challenges, but they all share one common factor: they can disrupt access to the basic things people rely on every day—water, food, power, transportation, and communications.

Preparedness is not about predicting exactly which event will occur. It is about understanding the effects these events create and being ready to manage those disruptions safely and responsibly.

When households prepare for disruptions rather than only specific disasters, they are better equipped to handle whatever challenges Hawaiʻi may face.