The massive heat wave in Europe is pretty alarming. Chiefly, because there have been a huge spike in heat related casualties; but as it pertains to this forum I am pretty curious about the vines there.Rioja and Rivera Del Duero for example are already seeing days over 40c (104f) and looks like more to come. Anyone in the area that can comment on the grapes/vineyards?
I am visiting Belondrade in Rueda today and will be in the Ribera y Rueda area for another two days. I don't think they are near veraison but will check on the vineyards for you.
It's 104F in Rueda right now. I looked at a number of bush vines, head trained, and single and double cordon and they are all looking good with no visible signs of stress. The grapes are still hard and the size of ball bearings. I met with Jean Belondrade Lurton at Belondrade and he said it may slightly advance the ripening process but there is no need for concern. It will most likely get hot again in July and August. Most of their vines are dry-farmed and they don't pull laterals (occasionally leaves to open the canopy) so the grapes are largely shaded. In general, it is hot and windy with a large diurnal shift so the disease pressure is low and it is fairly easy to farm organically and without irrigation.
Edit to add: they also don't cut (hedge) the shoots. I have seen photos taken today in France of wilted vines that had been cut earlier.