“People think it’s the end of the world,” Kevin V. Jain ’14 said.

Harvard Extension School canceled all night classes in the Yard, William James Hall, and CGIS. The Institute of Politics canceled a much-anticipated panel with high-profile presidential campaign advisers, including David Axelrod, Eric Fehrnstrom, and Meet the Press’s David Gregory. All upperclassmen intramurals were canceled as well.

Students in Lamont Library were ushered out of the building following two announcements made by library administrators.

The Massachusetts Bay Transportation Authority’s Red Line was disabled between the Park Street and Alewife stations during the outage, but the MBTA reported normal service minutes after power returned.

Cambridge Police spokesperson Daniel M Riviello said several area traffic lights were without power, prompting the department to dispatch officers to direct traffic in Harvard Square.

—Staff writer Nicholas P. Fandos can be reached at nicholasfandos@college.harvard.edu.

—Staff writer Samuel Y. Weinstock can be reached at sweinstock@college.harvard.edu.

—Staff writer Gina K. Hackett can be reached at ghackett@college.harvard.edu.

This article has been revised to reflect the following correction:

CORRECTION: Nov. 30

An earlier version of this article misspelled the name of Cambridge Police Department spokesperson Daniel M. Riviello.