Some companies prospered in the heatwave - combined with the World Cup - but others saw sales and profits wilt.
The chain says a number of its pubs do not currently have John Smith's or Strongbow cider because of the carbon dioxide shortage.
Pictures from the scene show the barrels lying on a big heap at the Barton 1792 Distillery in Bardstown, Kentucky.
The spirit now accounts for more than a third of total beverage exports, valued at around half a billion pounds per year.
The deal to make Heineken the third largest pub operator in the UK has been given the go-ahead by the competition authority.
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