The Jones Road Wildfire, which started last Tuesday in the Pine Barrens of New Jersey, is on track to become the worst in state history. Fueled by gusty winds, low humidity, and dry undergrowth — conditions increasingly common in the region — the blaze has scorched more than 23 square miles, forced thousands to evacuate, and threatened nuclear waste at a power plant. As of Monday, firefighters had contained just 45 percent of the inferno.