People don't need to have symptoms or insurance to get tested for free.
Gov. Tony Evers had previously stated he supports classes beginning in-person instruction in the fall.
The woman was treated for smoke inhalation.
Democrat Tony Evers takes office in January, but the GOP still controls the Legislature.
The first 911 calls came in around 10:25 a.m., police say.
A punctured gas main sent gas leaking into a property, which then exploded.