Cranberry growers in Massachusetts are eligible for disaster relief for damages caused by excessive heat and dry conditions in 2010.

The U.S. Department of Agriculture announced Jan. 25 that growers in five Massachusetts counties are eligible for federal disaster relief, according to a news release from the Massachusetts Executive Office of Energy and Environmental Affairs.

Crops in Barnstable, Bristol, Dukes, Norfolk and Plymouth counties were hurt by heat and lack of rain last summer and fall.

Cranberry losses were heaviest, with some growers reporting 30% production declines. Temperatures in growing areas topped 90 25 days in 2010, more than twice as many as in a typical year.

Despite the disaster designation, cranberry production actually increased in Massachusetts in 2010, according to the USDA.

About 1.86 million barrels were produced in 2010, up from 1.82 million barrels in 2009, according to a Jan. 21 report.