The polar vortex — ultra-cold air spinning like a top — usually stays above the North Pole, but sometimes stretches down to the U.S., Europe or Asia, causing intense doses of cold.
LOS ANGELES (AP) — LeBron James scored 30 points to become the NBA's career leader in 30-point games, surpassing Michael Jordan's record during the Los Angeles Lakers' 119-102 victory over the Atlanta ...