7 degrees in pittsburgh. by wednesday afternoon, it s only going to feel as warm as the teens from d.c. to boston. dangerous cold. david? all right, the single digits. we re ready. thanks, rob. i think. and to the wildfires in the west tonight. still growing, despite calmer winds, and the thomas fire in particular, it s now the fifth largest in california history. and the new concern tonight, we told you that firefighters have been digging those fire lines to halt the flames. but now the fires are jumping right over them. abc s senior national correspondent matt gutman again tonight. reporter: tonight, the thomas fire marching closer to communities after exploding in size. helicopters are making drops, they re trying to stop the spread. reporter: the fire, unpredictable and relentless, jumping fire lines meant to contain it. now scorching more than 350 square miles in seven days. prompting new evacuations in santa barbara county overnight. we met the claffey family today, car