I once lost everything to a house flood.
There's really nothing you can do. Make sure the right people are notified so they can provide assistance. You don't really have to provide anything, but maybe some candy or socks would be nice. Be there as a shoulder to cry on, that's one thing I didn't have. Just try not to mention and and keep her focused on other things.
English
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You always have to be aware of what the Flood is capable of. Always.