LP&L and Xcel customers are being asked to lower their usage until 8 p.m. Tuesday due to a potential energy shortage.
Xcel spokesman Wes Reeves says they had multiple units down for unplanned maintenance.
Since LP&L uses electricity from Xcel's power grid, they have asked their customers to conserve energy as well.
Both electric companies were concerned about customer's power usage during peak times of 3-7 p.m., but the energy alert lasts until 8 p.m.
The alert is currently at level 1 status, which is an appeal for customers to curb usage. Rolling blackouts aren't a risk to customers until level 3.
Xcel issues an alert to customers "only when a reduction in electricity use is urgently needed to maintain the electricity system and service to customers."
Reeves says conditions at one of the units is improving and hopes to have the problems fixed before tomorrow.
The following is a list of conservation tips from Xcel during a level 1 alert: