Make this text simpler.
During a crisis, the people who use an ECS need to quickly and easily launch their notifications and they need to be able to do so in a way that securely provides them with confidence and an intuitive, familiar and easy-to-use interface that can be accessed from any location.
During an emergency, users need to quickly and easily send their messages; and they need to be able to do it so that they are sure it succeeds and with a secure and easy to use interface that can be used from any location.