Planning to reside in New York or San Francisco in the near future? You might want to rethink your plan.

A new study from the National Oceanic and Atmospheric Administration (NOAA) released Thursday says that a majority of U.S. coastal areas will likely be inundated by 30 or more days of flooding a year by 2050.

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Annapolis, Wilmington, N.C., and Washington, D.C. are already experiencing the worsening flood situation. By 2020, Baltimore, Atlantic City and Port Isabel, Texas will join the list. Within the next 35 years, most of the cities in the Mid-Atlantic, Gulf and Pacific coasts will be dealing with routine flooding.

The study blames the continuous rising of sea levels on global warming. NOAA added that coastal communities are starting to experience the annoying sunny days and urban flooding these days.

"This is sea level rise. Unfortunately, once impacts are noticed, they will become commonplace rather quickly. We find that in 30 to 40 years even modest projections of global sea level rise will increase instances of daily high tide flooding to a point requiring an active, and potentially costly, response," explained William Sweet of NOAA and a co-author of the study.

The study did not include the Miami area because Hurricane Andrew destroyed NOAA tide stations in the area in 1992. The result is that continuous 50-year data set for the area does not exist.

NOAA also recorded 2014 as the hottest year and this because of global warming. Effects of climate change are now becoming visible in different cities in the United States and other major areas of the world.

Cities like New York, Chicago and San Diego have started to plan ahead, and are committed to better forecasting, natural buffer zones featuring wetlands and sand dunes, storm-proof infrastructure like sea walls and rules limiting building along vulnerable coastlines.

The study was published in Earth's Future, a journal of the American Geophysical Union.

TagsNOAA, global warming, sea level, urban flooding, flooding, coastal areas