An important email appeared in the inboxes of a small group of health care workers north of Boston as this summer started. It warned that local temperatures were rising into the 80s.
An 80-plus-degree day is not sizzling by Phoenix standards. Even in Boston, it wasn’t high enough to trigger an official heat warning for the wider public.
But research has shown that those temperatures, coming so early in June, would likely drive up the number of heat-related hospital visits and deaths across the Boston region.
