Severe winter weather threatens millions

SPARKING A MASSIVE AND DEADLY 30-CAR PILEUP IN COLORADO. DEADLY 30-CACAR PILEUP IN COLORADO. MORGAN CHESKY IS. IN COLOLORADO. MORGAN CHESKY IS TRACKING IT ALL. MORGAN CHESKY IS TRACKING IT ALL. >> Reporter: T TONIGHT, TRACKING IT ALL. >> R Reporter: TONIGHT, A SERIES OF WINTER. >> Reporter: TONIGHTHT, A SERIES OF WINTER STORMS SLAMMING. STORMS SLAMMING WESTERN STATES WITH DRENCHING RAINS, HEAVY. WESTERN STATES WITH DRENCHING RAINS, HEAVY SNOW, AND HIGH WINDS. DRENCHING RAINS, HEAVY SNOW, AND HIGH WINDS. >> LOOK AT THAT. SNOW, AND HIGH WINDS. >> LOOK AT THAT. >> Repeporter: IN. >> LOOK AT THAT. >> Reporter: IN COLORADO, DOZENS OF. >> Reporter: IN COLORADO, DOZENS OF CARS ANDND SEMIS PILING. CARS AND SEMIS PILING UP IN A CRASH LEAVING FOUR PEOPLE DEAD AND. UP IN A CRASH LEAVING FOUR PEOPLE DEAD AND 29 HOSPITALIZED. FOUR PEOPLE DEAD AND 29 HOSOSPITALIZED. AUTHORITIES SAYING. 29 HOSPITALIZED. AUTHORITIES SAYING VISIBILITY PLUNGED. AUTHORITIES SAYING VISIBILITY PLUNGED SHOWING DUST, AND. VISIBILITY PLUNGED SHOWING DUST, AND SHUTTING DOWN I-25 IN. SHOWING DUST, AND SHUTTING DOWN I-25 IN BOTH DIRECTIONS.

BOTH DIRECTIONS. >> WE'RE GOING TO MAKE SURE W WE HAVE EVERYONE. SURE WE HAVE EVERYONE ACCOUNTED FOR. >> Repororter: WHILE IN. >> Reporter: WHILE IN CALIFORNIA, A NEAR WHITEOUT IN THE SIERRA. CALIFORNIA, A NEAR WHITEOUT IN THE E SIERRA WHERE A GROUP OF 16. WHITEOUT IN THE SIERRA WHERE A GROUP P OF 16 SKIERS WENT MISSING. WHERE A GROUP P OF 16 SKIERS WENT MISSING AFTER AN AVALANCHE. SKIERSRS WENT MISSING AFTER AN AVALANCHE THIS MORNING. THIS MORNING. RESCUERS SAY SIX SURVIVED AND THAT TEN. RESCUERS SAY SIX SURVIVED AND THAT TEN OTOTHERS ARE STILL. SURVIVED AND THAT TEN OTHERS ARE STILL MISSING. OTHERSRS ARE STILL MISSING. THE BLIZZARD-LIKE. MISSING. THE BLIZZARD-LIKE CONDITIONS HITTING. CONDITIONS HITTING DRIVERS TOO. CLOSING DOWN NEARLY. DRIVERS TOO. CLOSING DOWN NEARLY 150 MILES OF FREEWAY. CLOSING DOWN NEARLY 150 0 MILES OF FREEWAY. >> IT LOOKED LIKE HE. 150 MILES OF FREEWAY. >> IT LOOKED LIKE HE WAS -- LIKE E HE WAS. WAS -- LIKE HE WAS SKIDDING A LITTLE BIT AND HE WAS TRYING TO, SKIDDING A LITTLE BIT AND HE WAS TRYING TO, LIKEKE, AVOID ME, BUT. AND HE WAS TRYING TO, LIKE, AVOID ME, BUT UNFORTUNATELY HE. LIKE, AVOID ME, BUT UNFORTUNATELY HE DIDN'T. DIDN'T. >> Reporter: NEAR LOS ANGELES, INTENSE RAINS. >> Reporter: NEAR LOS ANGELES, INTENSE RAINS FILLING CITY STRTREETS.

ANGELES, INTENSE RAINS FILLING CITY STREETS. SIDELINING DELIVERY. FILLING CITY STREETS. SIDELINING DELIVERY ROBOTS AND FORCING. SIDELINING DELIVERY ROBOTS AND FORCING WAYMOS TO PULL OFF. ROBOTS AND FORCING WAYMOS TO PULL OFF ROADS UNTIL CONDITIONS. WAYMOS TO PULL OFF ROADS UNTIL CONDITIONS CLEARED UP. ROADS UNTIL CONDITIONSNS CLEARED UP. THE MULTIPLE STORMS. CLEARED UP. THTHE MULTIPLE STORMS NOW BLAMED FOR GROWING. THE MULTIPLE STORMS NOW BLAMED FOR GROWING TRAVEL H HEADACHES. TRAVEL HEADACHES. FLIGHT DELAYS NOW TOPPING MORE THAN. FLIGHT DELAYS NOW TOPPING MORE THAN 4,000 NANATIONWIDE. TOPPING MORE THAN 4,000 NATIONWIDE.. AND A SEPARATE STORM. 4,000 NATIONWIDE. AND A SEPAPARATE STORM SYSTEM BRINGING RAIN. SYSTEM BRINGING RAIN AND SNOW FROROM THE UPPER MIDWEST TO NEW. AND SNOW FROM THE UPPER MIDWEST TO NEW ENGLAND TOMORROW. ENGLAND TOMORROW. WHILE CALIFORNIA AND THE ROCKIES MAY SEE. WHILE CALIFORNIA AND THE ROCKIES MAY SEE MORE POTENTIAL RAIN. THE ROCKIES MAY SEE MORE P POTENTIAL RAIN AND SNOW THIS WEEKEND, AND SNOW THIS WEEKEND, THOSE HEADACHES COULD GET EVEN WORSE. THOSE HEADACHES COULD GET EVEN WORSE. AND THIS WILD WEATHER. GET EVEN WORSE. AND THIS WILD WEATHER ACROSS THE WEST COULD. AND THIS WILD WEATHER ACROSS THE WEST COULD IMPACTCT THE NORTHEAST.

ACROSS THE WEST COULD IMPACT THE NORTHEAST BY THE END OF THE. BY THE END OF THE WEEK. >> MORGAN CHESKY JOINS. WEEK. >> MORGAN CHESKY JOINS US NOW LIVE. >> MORGAN CHESKY JOINS US NOW LIVE. MORGAN, WEWE CAN SEE ALL. US NOW LIVE. MORGAN, WE CAN SEE ALL THAT MUD THERE BEHIND. MORGAN, WE CAN SEE A ALL THAT MUD THERE BEHIND YOU IN ALTADENA IN. THAT MUD THERE BEHIND YOU IN ALTADENA IN L.A. YOYOU IN ALTADENA IN L.A. LANDSLIDES A CONCERN. LANDSLIDES A CONCERN TONIGHT? >> Reporter: YEAH, TOM. ABSOLUTELY RIGHT WITH MORE RAIN ANTICIPATED. ABSOLUTELY RIGHT WITH MORE RAIN ANTITICIPATED NOT ONLY TONIGHT, BUT. NOT ONLY TONIGHT, BUT THROUGHOUT THE REMAINDER OF THIS. THROUGHOUT THE REMAINDER OF THIS WEEK, AND THAT IS ONE. WEEK, AND THAT IS ONE OF THE REASONS THAT OFFICIALS S HERE IN. OF THE REASONS THAT OFFICIALS HERE IN ALTATADENA HAVE PUT UP. OFFICIALS HERE IN ALTADENANA HAVE PUT UP THESE CONCRETE. ALTADENA HAVE PUT UP THESE CONCRETE BARRIERS.