Duluth, Minn., As firefighters and other emergency crews work to get the wildfires in northeastern Minnesota contained, Minnesota Power is taking measures to protect public safety.

Minnesota Power advises customers in Hoyt Lakes and surrounding areas that if evacuation orders are issued, the company may shut off electric service to the impacted areas. The company says a proactive emergency power shutoff may be necessary as energized powerlines can hinder firefighting efforts and endanger public safety.

Minnesota Power is working closely with community officials, emergency management, the St. Louis County Sheriff’s Department and the Eastern Area Complex Incident Management Team directing the response to the wildfires. This emergency power shutoff is an important tool in keeping people safe.

Following an emergency power shutoff, restoration can take multiple days after wildfire risks have subsided and damage to equipment is accessed and repaired. Minnesota Power will update customers as the situation evolves through its mobile outage app and website www.mnpower.com Customers are advised to prepare for a power outage. Here are some tips: ‚ Keep freezers and refrigerators closed.

‚ Disconnect appliances and electronics to avoid damage from electrical surges.

‚ Use alternate plans for refrigerating medicines or power-dependent medical devices.

Go here for more information: https://www.mnpower.com/ Content/Documents/ OutageCenter/ FEMA%20power%20outage%20safety.pdf For more information about emergency power shutoffs, visit https://www.mnpower.com/ OutageCenter/ EmergencyPowerShutoffs Minnesota Power provides electric service within a 26,000square-mile area in northeastern Minnesota, supporting comfort, security and quality of life for 150,000 customers, 14 municipalities and some of the largest industrial customers in the United States. More information can be found at www.mnpower.com.

ALLETE, Inc. is an energy company headquartered in Duluth, Minnesota. In addition to its electric utilities, Minnesota Power and Superior Water, Light and Power of Wisconsin, ALLETE owns ALLETE Clean Energy, based in Duluth; BNI Energy in Bismarck, N.D.; and New Energy Equity, headquartered in Annapolis, Maryland; and has an 8% equity interest in the American Transmission Co. More information about ALLETE is available at www.allete.com.

Minnesota Power, 30 West Superior Street, Duluth, Minnesota 55802 www.mnpower.com For Release: May 16, 2025 Contact: Amy Rutledge Director – Corporate Communications Minnesota Power/ ALLETE 218-723-7400 arutledge@mnpower.com Minnesota Power calculates and reports carbon emissions based on the GHG Protocol. Details in ALLETE Corporate Sustainability Report.

The statements contained in this release and statements that ALLETE may make orally in connection with this release that are not historical facts, are forward- looking statements. Actual results may differ materially from those projected in the forward- looking statements. These forward-looking statements involve risks and uncertainties and investors are directed to the risks discussed in documents filed by ALLETE with the Securities and Exchange Commission.