. >> alissa harrington. >>> a home owner in south san francisco got the unexpected wake-up call. the patio game way to create a sink hole on edgewood way as workmen were laying cohn dags for 31 condos. they were digging a trench before the collapse. >> were we sitting on the coach and we heard, it's like drop a book on dirt and we have an 8 to 10 foot sink hole where the patio walkway used to be. >> the contractors are meeting sunday morning to see what can done about salvaging the property. >>> a large ranch home in the valley burned down today and fire investigators are trying to determine the cause. firefighters arrived at the fire just before 1:00 in the afternoon. and by them, the home was engulfed. the area is so remote, they don't have the fire high drants. both of the residents got out safely. >>> and smelly situation in free monday this morning. a tractor-trailer full of 22 tons of cigar badge overturned. the driver lost control and over he went. authorities closed that off ramp for a while until the rig and the tractor could be toed away. >>> still to come, how bay area