. >>> elissa harrington joins us live from san francisco where one protest has just wrapped up. elissa? >> reporter: katy, demonstrations will continue happening throughout the mlk holiday weekend. 18th and castro is back open but protesters shut down the intersection for a good hour. they're urging the lgbt community to take a stand and fight back against racism. a march in east oakland. a civil rights slide show. a rally in san francisco's castro district. these are just a few of several demonstrations happening in the bay area over the martin luther king jr. holiday weekend. protests against police violence involving black men and other minorities. the movement is also to take back mlk's legacy and support nonviolence and civil disobedience. >> until we get justice there is no peace. >> reporter: four were arrested during the march. among the dem op straighters, this woman's son was shot. she traveled to rallies all over the country demanding justice. >> new york, chicago, all around oakland, everywhere to say we're not going to go anywhere. and we're trying to educate mother

abc 7 news reporter elissa harrington looks at the cleanup there. >> the tree come down with the wires, with the flames and the whole nine yards. >> reporter: arshia ali says preschoolers were inside the building yesterday when the gusty winds took down a tree outside which toppled a power pole and started a small fire. >> we do fire drills and safety drills all the time so you tell the kids stay safe stay with the teachers and listen and follow instructions. >> reporter: today, power is still out. she posted signs at the school letting parents know it's closed. many neighbors spent the night in the cold, like patricia martinez. >> a big house and it gets very cold. i started putting candles on. i didn't know what else to do because i don't have another type of heater to turn on. >> reporter: her power came back on early this morning. she made coffee for one of the workers who spent the night directing traffic in the blistering cold. >> i saw one of the workers standing out there freezing so i opened my window and asked her do you want a cup of coffee. she said yes. >> reporter: crews

live in san francisco elissa harrington, abc 7 news. >> thanks so much. visit us online at abc 7 news.com for details on closures and detours and public transit options. we have a link for you to download. help navigate the detours, it is free on apple's app store or google play and we would love for you to join the abc 7 news group. >>> bay area now has the third worst traffic congestion in the country. that's according to the metropolitan transportation commission which released its first comprehensive report on bay area freeway congestion since 2009. alameda county is the bay area's congestion capital with six of the ten top spots -- hot spots. here is a list of the three worst traffic spots. >> the morning and evening on the i-80 as the chair said, to and from the bay bridge the morning commute southbound 880 silicon valley evening drive out of silicon valley on 68 over the snow bay and i have to tell you, if you've never drove that one, that one is a real treat. >> the mtc says it is working to activate more ramp lights and install traffic cameras an