The county council has issued advice after the sudden closure of a Worthing nursery.
Cbabiesafe Worthing, based in Manor Road, closed its doors on Friday.
A spokesman for West Sussex County Council said: “We are aware of this situation involving a private nursery and are taking the necessary steps.
“Parents or carers needing alternative childcare should contact the Family Information Service on 01243 777807 or email@example.com and make it clear that they need emergency childcare due to the closure of their current provider.
“Letters have been sent out today to parents of children who receive Free Entitlement funding.”
Cbabiesafe Worthing has been approached for a comment.
The private nursery provided funded early education for two-, three- and four-year-old children, according to Ofsted.
It was rated Good by inspectors in 2017.