In Houston, authorities are responding to more calls for possible carbon monoxide poisoning and the city is telling residents to boil water, if they have any, as the situation remains dire in Texas. WATCH THE FULL EPISODE OF 'WORLD NEWS TONIGHT': https://bit.ly/2Zo1Yzv WATCH OTHER FULL EPISODES OF WORLD NEWS TONIGHT: http://abc.go.com/shows/world-news-tonight WATCH WORLD NEWS TONIGHT ON HULU: https://bit.ly/3iQLwPp #WorldNewsTonight #Texas #WinterStorm