Puerto Rico sits atop a complex tectonic mosaic where the Caribbean Plate pushes against the North American Plate. Over the past decades, satellite altimetry and tide‑gauge records have documented a gradual subsidence of several centimeters per year, amplified by sea‑level rise and frequent hurricanes that erode shorelines. These measurements, while modest, translate into noticeable shifts for low‑lying neighborhoods and vital infrastructure.
The island’s experience is not isolated. Similar patterns appear in the Gulf Coast, the Mekong Delta, and parts of the Netherlands, where natural subsidence couples with anthropogenic groundwater extraction. The common thread is that slow, invisible change can quickly become acute when extreme weather events test the limits of built environments. Recognizing this link invites proactive design before the next storm.