INDIANAPOLIS (AP) - Crews are working to restore power to thousands of central Indiana residents who lost power amid dangerously cold temperatures .
About 2,600 of Duke Energy's Indiana customers remained without power late Wednesday morning. Most of those outages were in Hamilton County, just north of Indianapolis.
Duke Energy spokeswoman Angeline Protogere says the outages were caused by high power demand for heating that caused power line circuits to trip.
Indianapolis Power & Light says about 2,200 of its customers were also without power Wednesday.
The National Weather Service says the temperature fell to minus 11 degrees (negative 23 degrees Celsius) Wednesday in Indianapolis, tying the record low for the date set in 1966.
The U.S. Postal Service suspended mail delivery on Wednesday in parts or all of several Midwest states, including Indiana.
(Copyright 2019 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)