A Detroit spokeswoman says officials intentionally cut power to city hall and a convention center to prevent the municipal power system from crashing because of demand-related equipment failures.
Sections of downtown Detroit lost power Thursday after high demand from air conditioning during the previous days' 90-degree heat caused parts of the aging power system to fail.
Officials say one of five transmission lines supplying the system went down Wednesday and two more did so Thursday. Spokeswoman Karen Dumas says officials decided to cut power to the Coleman Young Municipal Center and Cobo Center so the remaining lines wouldn't overload.
The outages affected about a half-dozen government buildings and prompted Wayne State University to cancel evening classes.