tornado shelter School's Out for.... Severe Weather? By Cindee Talley • Jul 16, 2013 rootsweb.ancestry.com The Oklahoma Department of Education requires schools to provide 175 days of instruction. Districts can cancel school for any weather, anytime of the year. Public Shelter Policy in Oklahoma: Yes for Nukes, No for Natural Disasters By Cindee Talley • Jun 27, 2013 Oklahoma is the beating heart of tornado alley. State Impact Oklahoma reports community tornado shelters are closing because they are, "too popular." Listen to the audio feature.