Preliminary surveys indicate EF-3 damage in the Menasha and Appleton area, according to the governor's office. The Monday storms also brought high winds, hail, power outages and disruptions to public water systems, causing widespread damage, particularly in the Fox Cities.

"We are continuing to assess the devastation and destruction Wisconsin is seeing, especially in the Fox Cities, and we are committed to doing everything we can to help every family, business, and community affected recover," Evers said.

Evers says he signed the declaration, Executive Order 300, to help state agencies, local partners and utilities coordinate their response.

The State Emergency Operations Center was raised to a Level 3 on Monday, and multiple fire, law enforcement, public works and utility crews have been deployed to affected areas.