Ricketts announced the proclamation on Monday as first lady Susanne Shore urged residents to volunteer with the recovery effort.
Shore says Nebraska residents should visit the website www.nebraskaimpact.com to find new volunteer opportunities each day. Churches, groups and individuals can also register on the site and advertise their need for volunteers.
The Nebraska Impact initiative was launched in 2017 as part of the state’s 150th anniversary activities, with the goal of increasing volunteerism.
The flooding and severe weather has led 81 of Nebraska’s 93 counties to issue disaster declarations.