There have been worse earthquakes...(like in China)..but there it was in a huge country with places for people to go and some roads & landing strips for relief vehicles...and a central government which had resources.
This is too many people in too small a space, with no roads/streets in many places in the city, no power, almost no government, and many people who will decide that "survival of the fittest" applies.
You don't just drive a truck up in the middle with food and water for a thousand when 100,000 will try to get it.
It will be a nightmare devising a distribution system that both gets supplies where they are needed and keeps the suppliers safe.