New post on http://twitter.com/caltransdist3 : ADVISORY: All North and Southbound lanes on I-5 are being closed due to a large grass fire near Arena Blvd . Closures start at I-80 if traveling Northbound. Closures start at Highway 99 if traveling Southbound. SacPolice assisting with traffic diversions on surface streets. http://pic.twitter.com/mULt5GKyDG