The Chablis wine region has much in common with Champagne province, when it comes to climate. It has a semi-continental climate without maritime influence. The peak summer growing season can be hot; and wintertime can be long, cold and harsh, with frosty conditions lasting to early May. Years that experience too much rain and low temperature tend to produce wines excessively high in acidity and fruit that is too lean to support it. Vintages that are exceedingly warm tend to produce fat, flabby wines that are too low in acidity. Frost can be countered by heaters, and aspersion by sprinklers to form an ice layer. The exceptionally poor 1972 Chablis suffered frost at vintage time.