Xcel Energy has asked its 375,000 customers in Texas and New Mexico to conserve power because of hot weather and problems with a generator.

The utility says extremely high electric demand Tuesday across a wide region has tightened power supplies. The company, in a statement released in Amarillo, also says a major Xcel Energy generating unit has been down for unplanned repairs.

Spokesman Wes Reeves says the coal-fired plant has been fixed but it will take time to return to full power. Reeves says the plant is in Texas but he declined to provide the location.

The company urged consumers to limit their electric use through 7 p.m. Tuesday on a day that forecasters expected temperatures to top 100 degrees.