Across the United States, there are pockets of vulnerability where geography, weather and human nature converge in ways that heighten the risk of flash flooding.
Some of these dangers are well-known: canyons and valleys that funnel water into narrow channels, rivers and streams with long histories of overtopping their banks. But others are less obvious — places where people flock for fun and time away from their urban lives, unaware that the same features that make these spots so inviting will also make them deadly in the right storm.
To better understand where such disasters could happen next, CNN partnered with First Street, a research organization that specializes in climate risk data, to identify some of the places where vulnerability to sudden, destructive flash floods remains high — and often overlooked.
Our analysis does not include all places that could experience something like what Kerr County, Texas, endured in early July. But you can use the interactive map at the link in @cnn’s bio to explore the river locations most prone to flash flooding, according to a recent study.
📸 : Julian Quinones/CNN | Kyle Grillot/Reuters | Lucy Nicholson/Reuters | Monika Graff/Getty Images | Jim Wilson/The New York Times/Redux | MapBox
Policy across global construction is diverging. In the EU, revised Corporate Sustainability Reporting Directive rules ease near-term disclosure, while UK regulators tighten expectations for biodiversity and habitat protection to meet 2030 nature targets. Market response suggests superficial reporting no longer satisfies investors prioritising measurable outcomes in sustainable construction and environmental sustainability in construction. ESG performance is influencing asset valuation and risk rating alongside whole life carbon assessment benchmarks.
Physical climate risk is altering design parameters faster than sustainability standards evolve. Rising sea levels and climate volatility are reshaping sustainable building design principles, forcing developers to integrate low carbon design, resilient infrastructure, and lifecycle assessment from the outset. Coastal defences, surface water strategies, overheating mitigation, and retrofit solutions now define the building lifecycle performance of energy-efficient buildings. Projects resistant to adaptation risk significant write‑downs, underlining the importance of whole life carbon and life cycle cost analysis in every investment case.
Decarbonisation practice is accelerating. Transport for London’s full transition to solar-sourced electricity demonstrates how large public entities can act as anchors for renewable building materials manufacturing and clean energy procurement through power purchase agreements. The move supports net zero carbon buildings, net zero whole life carbon operations, and lower embodied carbon in materials used for eco-friendly construction. Cornwall’s approval for geothermal lithium extraction points to early domestic circular economy in construction, underpinning future battery supply chains essential for electrified plant and fleet decarbonisation.
For the sector, credibility rests on verified performance, not compliance claims. Developers and contractors are embedding sustainable building practices, circular construction strategies, and resource efficiency in construction into every tender. The shift combines eco-design for buildings with sustainable material specification, supporting a circular economy model and aligning with BREEAM and forthcoming BREEAM v7 frameworks. Carbon footprint reduction, low embodied carbon materials, and long-term end-of-life reuse in construction strengthen financial resilience and investor confidence in low carbon building portfolios.
Capital markets are rewarding delivery tied to measurable environmental impact of construction and decarbonising the built environment outcomes, reinforcing a clear direction toward carbon neutral construction and sustainable urban development grounded in life cycle thinking in construction.
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