RIRIE, Idaho (KIFI) — All schools within Ririe School District #252 have canceled all classes through the end of the week as a wave of illness leaves many desks and workstations empty. Superintendent Jeff Gee announced the closure on Wednesday on Facebook, citing a significant spike in absences among both students and staff. Both closures take place in what doctors are calling one of the worst flu seasons in three decades. RELATED: Super flu: Worst influenza season in 30 years sweeping IdahoWhile the classes in District #252 have been cancelled until Monday, all previously scheduled events will proceed as planned. "Thank you for your understanding and for helping us keep our students and staff healthy," states the post.