That heat dome – how are vines coping?

On 29 June, as the so-called heat dome settled over British Columbia, Washington and Oregon, the weather station near the Red Mountain AVA of Washington recorded an ambient temperature of 117.8 °F/47.7 °C. That was the third of what would be four days of high temperatures above 112 °F/44 °C which came hard on the heels of more than a week of highs above 95 °F/35 °C. Since then the daytime highs have not fallen below 97.7 °F/36.5 °C. Temperatures are expected to climb higher still in the coming...