A colossal sea arch that had long been a major landmark on Hawaii's rugged coastline has collapsed into the Pacific Ocean more than 500 years after it was naturally formed, the local park service confirmed.
Hōlei Sea Arch stood at a height of roughly 90 feet in Hawaii's Volcanoes National Park on the southern coast of the Big Island — the largest and youngest island of the Hawaiian chain.
The arch formed around 550 years ago when ancient lava flow from the eruption of one of the island's six volcanoes hit the cliff edges and carved the vault, creating a natural marvel that drew visitors to the spot for many years, according to the United States National Park Service (NPS).
While the exact time of the collapse is unknown, the Volcanoes National Park team said on social media Thursday that the arch was still standing on Wednesday, September 23, when the park was temporarily closed during Tropical Storm Nolo. When it reopened on Monday, September 28, the arch was gone.
"Yes, it's true. RIP Hōlei Sea Arch," Volcanoes National Park said in social media posts, alongside before-and-after photographs revealing a stark shift in the scenery. "Hōlei Sea Arch was a very special place to so many of our visitors," it added.
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📸: Yun Han Xu/Moment RF/Getty Images | Janice Wei/NPS
The prospective relinking of the UK and EU emissions trading systems could become a decisive driver for sustainable construction, especially for cement, steel and other carbon-intensive products. Stronger carbon pricing would make embodied carbon, whole life carbon and whole life carbon assessment central to procurement, cost planning and commercial risk. Developers, contractors and clients are likely to face greater scrutiny of the carbon footprint of construction, with low carbon construction materials, environmental product declarations (EPDs) and sustainable material specification moving from best practice to market expectation.
This shift reinforces the business case for lifecycle assessment, life cycle cost analysis and life cycle thinking in construction. Net zero carbon buildings and net zero whole life carbon strategies will depend not only on operational energy performance but also on embodied carbon in materials, circular economy principles and end-of-life reuse in construction. For project teams, sustainable building design, low carbon design and eco-design for buildings are becoming practical responses to policy, investor pressure and rising exposure to carbon costs.
Energy markets are strengthening the same direction of travel. Wood Mackenzie’s finding that four-hour battery storage now beats open-cycle gas turbines on cost in major markets supports all-electric, energy-efficient buildings designed around flexibility, storage and demand management. Low carbon building strategies are becoming more credible as grid systems decarbonise, improving building lifecycle performance and accelerating decarbonising the built environment.
Planning and delivery capacity remain serious constraints. Local authorities struggling to meet planning deadlines could slow housing, retrofit, green infrastructure and sustainable urban development, even as planning performance agreement fees rise. The Federation of Master Builders’ estimate that rogue builders have cost northern households more than £3bn exposes another weakness: environmental sustainability in construction depends on competent, regulated delivery as much as on green building materials, renewable building materials or BREEAM standards, including BREEAM v7.
Mandatory licensing and stronger quality control may prove essential to sustainable building practices, circular construction strategies and resource efficiency in construction. Sustainable design, eco-friendly construction and carbon neutral construction are increasingly viable in technology and economics; the critical test is whether the UK’s planning system, skills base and supply chain can deliver low-impact construction at scale.
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