>> red cross is going through a situation. but america's blood centers which collect 50% of the nation's blood say thing are tight but not at critical emergency level the red cross is. bottom line, folks if you can go, donate. get levels back up. >> amazing the fallout from the weather, having on crops, and blood supply, just seems to trickle down into every facet of life. >> don't realize the ripple effect until you see stuff like this. >> you really don't. >> amazing. still to come after the break, spoiler alert. >> turn your head if you don't want to see the highlights and low lights. we'll recap the games and how the u.s. is doing in the medal count. you are watching "world news now." >> announcer: abc's "world news now" will continue after this from our abc stations. now" will continue after this from our abc stations. w."ñ!ñcús