Is an EF2 tornado a disaster?

It depends. Some are worse than others. A tornado may be given a rating of EF2 based solely on damage to trees and power lines. In this case some places may lose power and some roads may be blocked, but most would consider this an inconvenience rather than a disaster.

However, an EF2 tornado can also completely destroy mobile homes and other weak structures and badly damage stronger ones. An EF2 that strikes a trailer park may kill multiple people and leave many more homeless. In such cases the tornado could be considered a disaster.