left, you can see it from space. leland: all of that is causing serious air quality problems across san francisco and other cities in california. the mail woman there is wearing a mask as is the ups driver. adam klotz in the extreme weather center with more on the smoke impact. hi there, leland. it continues to be an issue and the winds has shifted again. and they re dealing with the high fire danger, current it s the conditions, again, bone dry humidity. the winds picking back up. we ve got red flag warnings in north central california an area where the fires have been going. there s paradise. each one of the little lines is a wind barb, showing the direction of the winds. it s picking up the locations where the fire is high and danger is high and pushing it. even though there s not a fire in san francisco, it s push west and driving that smoke. unfortunately smoke is an issue throughout the entire weekend.
this is now the largest fire, according to california fire official nls the history of the sierra-nevada range. over 150,000 acres. here s what one fire official said about the impact on this area. really a tremendous impact. highway 124 into yosemite on the northgate is closed now. so the town of groveland, it s actually their biggest economical weekend of the year, there s no one there. it s like a ghost town. it s like i had some of my fire officers up at pine crest lake, real famous and usually on sunday there s 10,000 people there, zero yesterday. everywhere, smoke impact and we re losing so much economy it s unreal. reporter: now, despite the bleak assessment the fire officials feel like they re getting a good handle on things. you mentioned earlier 15%