Similar things have been happening in Salem, MA for over a month. The streets are just too narrow to handle a crowd of 100,000 people each day, not to mention vehicle traffic (which the town has been actively discouraging by closing streets and asking people to use mass transit).

There was also the Traviswold thing that happened a few months back. The concert venue was oversold and overcrowded, and people got suffocated & trampled.