Baltimore Sun: Crowning summer cookouts, ears of local corn are hot weather staples. Roasted on a grill, splashed with butter and sprinkled in salt and pepper — and in Chesapeake Country, Old Bay, of course — corn makes barbecues complete. This essential summer side dish may be in danger, however, if global warming continues to incrementally warm our Mid-Atlantic region. Corn, which prefers growing at about 50 to 86 degrees Fahrenheit, will feel the effects from hotter temperatures and more …