NATIONAL—Soon after Boston, Massachusetts Mayor Marty Walsh ordered a halt on all construction in the city last week, three other Massachusetts cities followed suit: Cambridge, Chilmark, and West Tisbury. 

Last week in San Francisco, California, a stop-work order was issued for all Bay-area commercial construction projects excluding housing construction. 

Pennsylvania Governor Tom Wolf issued a halt to all "non-life-sustaining businesses," effectively halting construction projects, after March 21. 

In addition, California, New York and Illinois have all announced "stay at home" orders of nonessential businesses, but for the time being, most construction work is continuing.