Anything more than five floors is not advisable especially in Sri lanka where lack of power will make life misarable.
7:01 AM GMT+0530
As I mentioned I am very concerned for the possibly thousands of people trapped on upper floors of darkened apartment buildings. Without food, without water, without elevators. Even if you aren't elderly the idea of trying to go 15 or 20 floors down a dark stairwell ( and then back up ) to fill a prescription or get some food and water ( assuming any stores are open and you can carry such a load back up) is scary.
I don't believe FEMA or the Federal government can do much here. The Post Office maybe could be then you'd have to be able to tell their union their employees will go out into their neighborhoods and knock on doors.