sea level rise

Scientists need to track the history of sea temperatures precisely to model climate change. A newly discovered clue in measurements taken by sailors in the 1930s could have far-reaching implications.

As sea levels rise, coastal flooding that used to happen only during storms is increasingly occurring on sunny days. That has local officials reconsidering everything from zoning to police budgets.

Sea-level rise is so acute in South Florida that local governments are eyeing hundreds of millions in spending to mitigate floodwaters. But wealthy foreign investors don't seem fazed.

Federal maps help determine who on the coast must buy flood insurance, but many don't include the latest data. Maryland is now making its own flood maps, so homeowners can see if they're at risk.

Living by the shore in the age of climate change means managing risk. In the community of Nahant, Mass., residents are trying to decide how to adapt.