Why the Hōlei Sea Arch collapse brings a warning about unstable cliffs

That gap matters because the park was temporarily closed during Tropical Storm Nolo. The arch may have fallen during the closure, but the possibility does not narrow its collapse to a particular moment. It also does not tell visitors what happened to the rock before it gave way.

The account of the collapse establishes the loss of the landmark and the period in which it happened. For anyone considering a visit, the more immediate fact is that the park service has warned people away from the site that remains.

Did Tropical Storm Nolo bring down the arch?

The reporting does not establish that it did. Nolo and the temporary park closure are part of the timeline, not a confirmed explanation for the collapse. A storm and a rockfall occurring within the same several-day period do not, by themselves, show that one caused the other.

Nor does the warning about unstable cliffs settle the cause. It describes a hazard for people near the former arch. It does not identify what made the arch fall between Sept. 23 and Sept. 27.

The distinction is practical, not merely technical. Visitors need to take the warning seriously without waiting for an account of the collapse’s cause. At the same time, an explanation of the event should not be presented as established when the available reporting leaves it open.

What do we know about the Hōlei Sea Arch itself?

The arch stood about 90 feet high along the coast of Hawaiʻi Volcanoes National Park on Hawaiʻi Island. It was reported to have formed about 550 years ago. That is an approximate age for the arch, not a precise date for its formation or an account of the process that shaped it.

It extended over the Pacific before its collapse. The Associated Press account carried by Courthouse News Service describes a tourist landmark that is now gone, alongside a warning about the nearby cliffs. The loss of the arch and the continuing hazard are related, but they are not the same thing: one concerns what happened to the landmark; the other concerns where people might stand now.

The arch’s reported age offers no basis for predicting the condition of the surrounding cliffs. Its former height says nothing about where a visitor could safely approach the site. For those decisions, the park service’s warning is more useful than the arch’s measurements or history.

How should visitors respond to the warning near the former arch?

Stay away from the site and do not enter the closed area. The NPS warning identifies unstable cliffs and a serious falling hazard near the former arch. It is a warning about the place as it is now, not simply a notice that the landmark can no longer be seen intact.

That means a closer look or photograph is not a reason to cross a closure. The uncertainty about precisely when the arch fell does not lessen the danger the park service has identified. Neither does the absence of a confirmed cause: the visitor-safety advice does not depend on determining whether Nolo played a part.

The available accounts leave questions about access elsewhere in the park and any future viewing arrangements near the former arch. They do not provide a basis for treating the site warning as a parkwide closure—or for assuming there is a safe place to approach the former arch. The instruction they do establish is to stay away from the site and its closed area.