Record high tides predicted for this storm

With evacuation requests already issued north and south of the city, the National Weather Service is warning that Boston Harbor could see its highest recorded tides ever Friday or Saturday:

The present forecast is for 15.3 [feet] ... this would put it above 15.13 observed on January 4th and it would be the highest observed tide since records began in 1928 at the Boston tidal station.

Meanwhile, the management at Atlantic Wharf told tenants today they're unleashing the Aquafence:

Dear Customers:

Severe weather is expecting to impact Boston this Friday and will be
coupled with astronomical high tides causing potential for coastal
flooding in our area. As you may be aware, Atlantic Wharf is
proactively equipped with a mobile flood protection system called
Aquafence.

Due to the pending threat of forecasted coastal flooding in Boston
Harbor, we will partially deploy the Aquafence starting around 11:00am
today and throughout the afternoon. One of the advantages of the
Aquafence system is that it can be installed in phases, thus allowing
us to leave certain sections open and further allowing us to leave our
main entrances and garage open as long as possible during our storm
preparations. Our intent is to leave the main building entrances open
and clear of the Aquafence system until the threat of flooding appears
imminent.

The first actual threat of potential flooding will come at high tide
at approximately 11:00am on Friday, March 2nd. We will have extra
building staff and security onsite throughout the process. We will
watch the tide waters closely and will complete the final enclosures
of the Aquafence only if the flooding threat is appearing imminent.

We anticipate the flooding threat will only occur several hours before
and after the time of high tides. If the Aquafence is required to be
fully deployed, we would break it down to re-open the main entrances
as soon as tides and/or water levels recede.

The next high tide will occur at approximately 11:45pm on Friday,
March 2nd, then again at 12 Noon on Saturday, March 3rd.

All Customers should be made aware, in the event that the Aquafence is
fully deployed and entrances closed:

Occupants in the building will need to Shelter in Place.

Temporary emergency egress paths will be maintained in the event of a
building emergency.

The parking garage will be temporarily closed and vehicles will not be
allowed in or out, no exceptions only while the Aquafence is fully
deployed (i.e. potentially for the 1-3 hour period around the high
tides).

The loading dock will be temporarily closed. All deliveries should be
scheduled to be completed prior to 9am on Friday March 2nd and
Saturday March 3rd.

Security staff will be posted at various locations to communicate with patrons.

We encourage you to plan ahead. While the building will remain open
throughout this storm, we ask all Customers (at your discretion) to
minimize the number of employees in the building and consider allowing
non-critical employees to work from home on Friday. Any planned
visitors should be advised of the situation and circumstances. With
the potential temporary closure of the garage, is it also advisable to
encourage employees not to park in the garage and consider alternative
commuting options.