Drought in Cambridge? Surely you mean simply an extended period without rain. After all, there was the drought of 1976, and people then didn’t have that worried edge to their voices when they said the word. Ah yes, but in 1976 the world was simply turning, and the next major event was likely to be billions of years into the future, unless we were hit with a random asteroid on its way somewhere.
But now, with the River Loire in France so low it can be crossed on foot, the Rhine so low that barge traffic cannot move, and Yangtse in China slowed to a sluggish crawl, people see the world differently now.