DAVID ABEL’S front-page article on the Climate Ready Boston report should be a call to action. The comment “It’s so stark it’s hard to wrap one’s head around’’ may be true, but it is precisely what we need to do.

The science is as certain as science can be that the climate is changing, with resulting sea level rise and the potential for more intense storms. It matters not whether the future sea level is 6 or 10 feet higher. Once it rises between 3 and 4 feet, Boston would experience nonstorm-related flooding that would cause significant waterfront street flooding and possibly close the Silver Line and I-90 tunnels. In short, way before 2100, it is likely that we will have conditions that we cannot tolerate.

Boston is fortunate to have some of the greatest heads for collective issue wrapping. Under Mayor Walsh’s leadership, the city is already acting with a highly qualified consulting team. Our world-class universities are already participating in the process. The region is home to many of the world’s best planning, engineering, and architectural firms.

Our challenge is not finding a single answer but implementing all the many measures that contribute to the solution, from reducing the demand on resources to building tidal barriers through the outer harbor islands. Our goal should be implementing these measures by Boston’s 400th anniversary in 2030, so that our great-great-grandchildren can celebrate the city’s 500th.

We have heads aplenty. Let’s begin working together.

Bob Daylor

Milton

The writer is senior vice president of Tetra Tech, a global engineering firm.