A massive power outage in Detroit, Michigan on Tuesday morning is leaving much of the Motor City in the dark.

Spokespeople for the city and DTE Energy confirmed at around 11:00 a.m. local time on Tuesday that most of Detroit's municipal grid is offline, preventing power from being delivered to police stations, schools, traffic lights and other city-run facilities and services.

Municipal buildings were being evacuated, WXYZ Radio anchor Alicia Smith tweeted early Tuesday, although eyewitnesses on the ground told her shortly after 11 a.m. that people were reportedly becoming stuck in elevators.

According to Smith, a spokesperson for the city of Detroit confirmed that most of the municipal power grid was down. Residential structures are apparently unaffected, and some of the emergency facilities — like fire stations — have back-up generators, a local Fox News affiliate reported.