(ABC7Chicago) - The price of wine is expected to increase because of a combination of a severe drought on the West Coast and a cold snap in May.

The result is that some vineyards in California's Napa Valley are producing less than half their normal yield, which drives up prices.

And it could get worse.

A heat wave this week is expected to ruin many of the grapes that are already ripe.

There is one upside to all this. Some wine connoisseurs say less fruit on the vine makes the grapes taste better.

The average wine buyer may not immediately notice the difference, but they will if yields remain low.