Hopefully the vines in this part of Touraine will be OK as the buds haven't started but other fruit trees are now in blossom so they may be affected. Further west the vines are more advanced, so if they had frost too there could be some damage. Muscadet, in particular cannot afford another frost this year following last year's devastating one.
Unfortunately frost is forecast again for tonight. As Sir Alex Ferguson has famously said: "It's squeaky bum time!"