MADISON - Update 7/19, 5:10pm:
Power has been restored to nearly everyone in Wisconsin's capital city after a pair of blasts knocked out electricity to about 13,000 customers on the hottest day of the year.
Madison Gas and Electric reported late Friday afternoon that only two people were still without power after the blasts at two different transmission stations sent thick, dark plumes of smoke high in the air. No injuries were reported.
Gov. Tony Evers declared a state of emergency and made the National Guard available if necessary.
The state Capitol, government buildings and many businesses were closed because of the power outage, which came on the hottest day of the year with temperatures in the mid-90s.
All state court system offices in downtown Madison have closed because of fires at two transmission stations that left more than 11,000 customers without power.
Director of State Courts Randy Koschnick said Friday the closures include administrative offices and the clerks of the Supreme Court and Court of Appeals. Koschnick anticipated the offices would reopen Monday.
The power outage has also affected public access to some court system electronic services, including the Wisconsin Circuit Court Access website and electronic filing in some counties.
The loss of power caused other closures as well, including the State Capitol, the City-County building and the state Department of Health Services.
Authorities don't yet know what caused Madison Gas and Electric's main power center to explode and erupt in fire Friday morning. A second substation near the University of Wisconsin-Madison campus also caught fire.