Fueled by powerful winds and dry conditions, a series of ferocious wildfires erupted last week and roared across the Los Angeles area.

"It's going to warm people up, especially as we face a little Arctic front ahead of us," Montpelier Alive's executive director, Katie Trautz.

Americans face dangerously cold temperatures as a polar vortex brings life-threatening conditions. Nighttime lows may drop to ...