Thousands without power after two explosions involving Madison Gas and Electric (MGE).

The first fire broke out around 7 AM Friday in Downtown Madison. The second, minutes later at a substation near the UW campus.

MGE released a statement saying, "Due to a fire this morning, some electric customers are out of service. The fire occurred at a substation containing equipment of MGE's and American Transmission Company. The fire is out, and damage assessment will get underway. At this time, we believe the fire was due to a mechanical issue.

Outages extend from the west side of downtown's Capitol Square to areas around the Yahara River. We have no estimated time of restoration but will issue updates as we do our damage assessment and get more information. Crews are working as quickly as possible to safely restore service. We have no reason to believe the cause of the fire is due to excessive usage from today's high temperatures.

We're working with our partners at American Transmission Company and the Madison Fire Department to investigate the cause. Please avoid the area surrounding East Washington Avenue, East Main Street, South Livingston Street and South Blount Street. MGE regrets any inconvenience and urges customers to seek indoor areas with air conditioning.

MGE will continue to update our social media and media."