Operation Deimos

Boston could face 18 high-tide flooding days over the next year and up to 70 days by 2050, according to new predictions as "sunny day" flooding becomes more common due to years of sea level rise amid climate change.

High-tide flooding (HTF) broke or tied records in three locations in U.S. coastal areas in the past year, according to data released Tuesday by the National Oceanic and Atmospheric Administration (NOAA).  HTF has become increasingly frequent across the country but will likely decline this year,...