All she could possibly do is get in the way at this point. Local responders do not need to deal with security details for a former president, current president or VP right now. They need money and people to help on the ground. Not photo ops.
Harris, Biden and Trump all issues statements day of. Biden authorized federal aid and mobilized fema yesterday. He also is calling for Congress to come back from recess to approve additional aid.
What more could any of those three offer at this point? Thoughts and prayers? They did that too.