As Mass. cities and consumers struggle to find rock salt to melt lingering ice, at least one state in the Northeast already declared a disaster emergency anticipating the shortage would be a problem.

THE WEEK’S MOST POPULAR CURRENT HARD ROCK SONGS ACROSS ALL GENRES, RANKED BY STREAMING ACTIVITY DATA BY ONLINE MUSIC SOURCES TRACKED BY LUMINATE, RADIO AIRPLAY AUDIENCE IMPRESSIONS AS MESURED BY ...