Mark Drakeford defended delaying the roll out, saying using all of its stock would mean "all our vaccinators standing around with nothing to do".
Two people have also been injured after incident in Monmouthshire, Gwent Police confirms.
Six weather warnings are currently in force across the UK.
Flooding in my south Wales village has cost many their homes and livelihoods. But laughable help means we're feeling abandoned, writes Emily Davies.
More than 300 flood warnings are still in place across the UK.
Man Dies After Falling Into River In South Wales During Storm Dennis As Police Declare 'Major Incident'
More flood warnings and alerts in force in England on Sunday than on any other day on record.
The “mega-blaze” is now covering more than 300,000 hectares – an area the size of greater Sydney.
Steve Bray will run in the Labour stronghold of Cynon Valley, south Wales.
Gwent Police are investigating allegations that some care home staff are victims of modern slavery.
The victim died following an assault in Neath on September 1.