for kirk morrison and stormy buonantony, i'm beth mowins. good night from seattle. 24-21, huskies. ♪ if i could, baby i'd ♪ how can i, when you won't take it from me. ♪ ♪ you can go your own way. xfinity mobile's fast nationwide 5g network meets the first iphone with 5g. get the new iphone 12 on xfinity mobile. and right now, get $250 off. learn more at an xfinity store today. >> announcer: building a better bay area for a safe and secure future. this is abc 7 news. >>> a dramatic surge in coronavirus cases leads to the bay area's most populous county to take drastic action while other counties are having to roll back. with that we say good evening and thank you so much for joining us. i'm dion lim. lots of big developments tonight with the coronavirus as the bay area counties tighten restrictions. already in the purple tier, santa clara county is imposing mandatory quarantine for some travelers. there's also a temporary ban on contact sports like football, which includes pro and college teams san francisco and san mateo counties announced t