To combat periods of frost during the nighttime on vineyards, cultivators make use of smudge pots to prevent the plants from being damaged by the frost. Alternatively they also sprinkle water on all plants so that they only have to endure a “light frost”.
On Facebook I found this great set by photographer Titouan Rimbault depicting the whole thing. Here’s a small selection:
More photos on Facebook: Titouan Rimbault Photographe: Les grands crus de Chablis se battent contre le gel →