Answer: There are numerous fungal diseases, as well as at least one bacterial disease, called Pierce's Disease. Although there are controls for the fungal diseases, the only way to manage Pierce's Disease is by planting resistant varieties.
It is impossible for me to know what disease affected your vines. If the plant produced well in previous years, you might chalk up the troubles to the season's hot and humid weather, as well as the fact that the hurricane so damaged the plants that the damaged tissue invited invasion by disease organisms.
You might try planting a second, disease-resistant variety as well as keeping your old vine for another year, just to hedge your bets. The web site below lists some disease-resistant varieties:
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