The states were: Alaska, Arizona, Colorado, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Maine, Michigan, Minnesota, Missouri, Montana, Nevada, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Texas and Virginia.
"Every workday, 68 million children are separated from their parents," Carolyn Miles, Save the Children's president and CEO, said in a statement with the group's annual disaster report card. "We owe it to these children to protect them before the next disaster strikes."
After Katrina exposed problems in the nation's disaster preparedness, the presidentially appointed National Commission on Children and Disaster issued final recommendations in 2010 .calling on the states to require K-12 schools to have comprehensive disaster preparedness plans and child care centers to have disaster plans for evacuation, family reunification and special needs students.
Idaho, Iowa, Kansas and Michigan do not require any of the four recommended plans, the study found, while D.C. and the remaining states each require one or more of them.
The number of states meeting all four standards has increased from four to 22 since 2008, the report said. The group praised New Jersey, Tennessee, Nebraska and Utah for taking steps over the past year to meet all four standards.
Save the Children said it found gaps in emergency preparedness during a year when school shootings devastated Newtown, Conn., Superstorm Sandy wreaked havoc along the East Coast and tornadoes ravaged Oklahoma.
Miles said such disasters "should be a wake-up call, but too many states won't budge."
A spokeswoman for the National Governors Association declined comment on the report, referring questions to the various states.