Eleven areas in Gurugram, including some housing commercial buildings, would face a 3.5-hour-long power cut from 9.30 am to 1 pm today. The decision of the planned power outage is taken because the Haryana Vidyut Prasaran Nigam Limited (HVPNL) will carry out annual maintenance work on one of its 66kV substations in DLF Block Q, power officials said.