According to an article in USA today, More than half in U.S. at greater risk in disasters
More than 50% of the U.S. population may be in need of special attention during extreme weather events, with such emergencies putting the disabled, seniors and children at greater risk.
Nearly one in five Americans is disabled, which means about 60 million people are more at risk during times of emergency.
“Very little is known as to how to make these individuals safe,” says Irwin Redlener, head of the National Center for Disaster Preparedness at Columbia University’s Earth Institute and one of the foremost authorities on disaster relief.
Recovery Diva 
The Professor needs to pay better attention to the information that’s already out there. We know a great deal about how to meet the special needs of the disabled, children, and the elderly – our failures aren’t due to faulty knowledge but poor execution.
The biggest question mark – for me – is the reason for the huge jump in the number of disabled since ~2007.