Hawaii Volcano Death Toll 2018: Verified Facts and Context

Direct and Indirect Deaths in 2018

During Kīlauea’s lower Puna eruption in 2018, the direct volcano-related death toll included one person who died from a lava bench collapse at the Kapoho coastline. No fatalities were caused by lava flows or fountain-fed hazards in evacuated zones. Additional indirect impacts included health effects from dense volcanic smog (vog) and infrastructure disruptions, though no additional confirmed deaths were attributed to the eruption itself. The response by the USGS Hawaiian Volcano Observatory and Hawaii County Civil Defense shaped how risk information was communicated and acted upon during the event.

Confirmed Fatalities and Circumstances

One Direct Fatality

The only confirmed direct death related to the 2018 activity occurred when a lava bench on the coastline collapsed, engulfing a resident near the Kapoho area in the early morning of June 2. The victim fell into a pocket of seawater trapped behind the newly formed land and was later found deceased. This incident underscored the instability of new lava delta formations and the immediate danger of entering restricted zones during active lava entry. Emergency responders were unable to recover the body due to ongoing hazards, and the area remained closed.

Context on Lava-Bench Hazards

Lava benches are unstable landforms created when molten lava enters the ocean and solidifies into a fragile, overhanging cliff. These structures can collapse without warning, releasing scalding water, steam, and toxic gases. Prior to 2018, there had been multiple documented injuries from similar collapses, but this event marked the first confirmed death directly linked to a bench collapse during the lower Puna eruption. Understanding these hazards was central to public messaging and access restrictions throughout the event.

No Fatalities in Evacuated Communities

Although more than 700 homes were destroyed across the Leilani Estates and Lanipuna Gardens subdivisions, no residents died as a result of lava flows, gas emissions, or ground cracking within evacuated zones. Effective emergency planning, real-time monitoring, and timely evacuations led by Hawaii County Civil Defense and supported by the USGS Hawaiian Volcano Observatory prevented casualties in areas where homes were most heavily impacted. Long-term community displacement and property losses remained significant, but survival rates were high due to proactive measures.

Health and Infrastructure Considerations

Vog and Respiratory Exposures

The eruption increased sulfur dioxide emissions, producing dense volcanic smog (vog) that affected air quality downwind, particularly in the Kona district. While vog can exacerbate respiratory conditions, no direct deaths were attributed to vog-related illnesses during the event. Public health agencies advised sensitive groups to limit exposure and use appropriate respiratory protection. Long-term epidemiological studies on population-level health impacts remained ongoing.

Infrastructure and Utility Disruptions

Key infrastructure impacts included the burial of parts of Highway 137, damage to residential power lines, and temporary loss of access to coastal areas near Pohoiki. Geothermal wells operated by Puna Geothermal Venture were evacuated and secured after initial lava entry. No casualties were linked to utility or industrial incidents, though these disruptions highlighted the vulnerability of coastal infrastructure to ongoing volcanic activity.

Monitoring, Alerts, and Communication

The USGS Hawaiian Volcano Observatory maintained continuous monitoring through seismic networks, GPS stations, and webcams, enabling rapid detection of ground deformation and eruption dynamics. Civil Defense issued timely alerts and updated access policies as conditions evolved. Public outreach emphasized the importance of adhering to closures and avoiding newly formed coastal entries. This coordinated communication helped limit exposure and contributed to the absence of additional fatalities despite extensive residential destruction.

Key Facts at a Glance

Before and After the 2018 Eruption

Prior to May 2018, Kīlauea had been in continuous activity since 1983, with hazards primarily affecting the East Rift Zone in less populated areas. The 2018 event shifted focus to the lower Puna region, introducing new risks associated with lava-ocean entries and rapid community impacts. Post-event assessments emphasized the importance of updated evacuation plans, resilient infrastructure design, and sustained monitoring to reduce future risk, particularly in coastal zones where benches and new landforms are likely to form.

Comparison with Other Hawaiian Eruptions

Unlike events such as the 1868 earthquake and lava eruption that caused multiple fatalities, or the 1924 explosive activity that resulted in deaths from ballistic projectiles, the 2018 lower Puna eruption was characterized by effusive lava flows and bench collapses rather than explosive events or widespread earthquakes as primary causes of death. This comparison reinforces how hazard profiles differ by eruption style and informs long-term risk communication.

Long-Term Takeaways for Residents and Visitors

• Lava bench areas remain hazardous even after flows cease; signage and barriers should be respected.
• Stay informed through official channels during volcanic activity, including real-time alerts from HVO and Civil Defense.
• Property and infrastructure protection can mitigate long-term losses even when immediate fatality risk is low.
• Continued research and monitoring support more accurate risk assessments for future events.