From the USDA (pdf):
Contracted production of California processing tomatoes is forecast at a record high 14.0 million tons, averaging 48.61 tons per acre, according to a survey conducted by the National Agricultural Statistics Service. The current forecasted production is 17.6 percent above the 2013 crop.
Drought has been an issue for some crops, but apparently not tomato:
The extreme drought in California has forced growers to fallow land and cut back on the acreage for many crops, but the impact on tomato acreage appears to be limited. The projected harvested acreage of tomatoes is 288,000 acres, a 12.5 percent increase from 2013.
I’ll speculate that what we’ll see, once the final data on the California Drought of 2014 is in, that what water farmers had access to was shifted to high-value crops like almonds and vegetables, and the acreage drop will be in the low-value stuff.