Imo they shouldn't let anyone in until the roads have been cleared and electricty restored. It'll take a lot longer for water and sewage to be restored considering all the severed pipes when the lots were levelled. It's not safe, it's not sanitary so it's not responsible. If people still want to return to get their belongings then what about protecting others' belongings from looting, etc.? If they can't support relief workers they can't allow people to stay there.
I dunno maybe some people have to see to let go or they lost loved ones or animals they think might still be there. Who knows, maybe in a few days they'll let them go in supervised during daytime with a Will Not Rescue waiver or something.