00:54 Climate Change Already Hitting U.S. Housing Market Two new studies outline the risks climate change is already posing to real estate along U.S. coasts.

At a Glance More than 300,000 coastal U.S. homes could be flooded regularly by high tides in the next 30 years, a new study finds.

The culprit is sea level rise fueled by climate change, which is expected to cause "sunny day" flooding with more regularity in the coming decades.

Under a worst-case scenario, these high-tide floods could happen once every two weeks along much of the U.S. coastline.

More than 300,000 homes along the United States coastline could face severe impacts from high-tide flooding within the next three decades, a new study has found.

Flooding caused by sea level rise fueled by climate change could impact these homes 26 times a year, or once every two weeks, by 2045 if greenhouse-gas emissions aren’t severely cut, a report released Monday by the Union of Concerned Scientists finds.

The findings reveal that every state along every coastline in the Lower 48 would be impacted, with some states having up to a quarter-million homes in the flood zone by 2045, roughly the span of a current 30-year mortgage. By the end of the century, as many as 2.4 million homes worth a combined $1 trillion could be threatened, according to the study.

States with the most homes at risk by the end of the century are Florida, with about 1 million homes or more than 10 percent of the state’s current residential properties, New Jersey with 250,000 homes, and New York with 143,000 homes.

The flooding, researchers warn, could make those homes no longer practical to inhabit and cause their market and taxable values to plummet, which would hurt communities.

"The impact could well be staggering ," Kristina Dahl, a senior climate scientist at the UCS, told the Guardian. "This level of flooding would be a tipping point where people in these communities would think it’s unsustainable."

(MORE: U.S. High-Tide Flooding Has Doubled in 30 Years, NOAA Says )

What's especially concerning about this report is that it focuses on high-tide flooding alone, not the kind of flooding that could be brought by storm surge or other weather factors. In other words, sea level rise under these projections would cause "sunny day" flooding 26 times a year, in addition to the impacts of any flooding caused by severe weather.

The study's authors drew their conclusions after an in-depth study of NOAA's sea level rise projections, combined with Zillow property data. It's important to note that the conclusions were drawn from NOAA's worst-case scenario projections, so limiting climate change's impacts or better flood-mitigation infrastructure could lead to less extreme consequences.

Still, the study's authors say the findings are a clear sign that world leaders need to work quickly to reduce sea level rise by reducing carbon emissions because the scenarios shown by projections are ominous for several of America's coastlines.

"Even homes along the Gulf Coast that are elevated would be affected, as they’d have to drive through saltwater to get to work or face their kids’ school being cut off," Dahl told the Guardian. "You can imagine people walking away from mortgages, away from their homes."

The scientists also released an interactive graphic so residents can see the impacts of sea level rise in their communities; it can be seen here .