Pleasant Hill Community Emergency Response Team classes, 6:30 p.m. Thursdays, Sept. 13-Oct. 18, fire training center, 2945 Treat Blvd., Concord. Registration: www.pleasanthillcertsignup.com. Information: www.pleasanthillcert.org.
Free disaster preparedness fair, 10 a.m.-1 p.m. Sept. 8, Safeway, 3334 Alhambra Blvd., Martinez. Learn how to prepare family for disaster. Free hot dogs. 925-229-0212
Community Service Day
Volunteer registration open for Pleasant Hill's Community Service Day, Sept. 22, Pleasant Hill Park, Gregory Lane. Free breakfast, T-shirts. 925-671-5229. Registration: www.pleasant-hill.net/volunteer.
Main Street car show
Madness on Main Street Car Show, 10 a.m.-3 p.m. Sept. 8, Main and Ferry streets, Martinez. Music, vendors, raffles, awards. Car registration $20, $25 at door. Registration: www.mainstreetmartinez.org/php/CarTruckBikeShow.php.
75th annual Walnut Festival Sept. 20-23, Heather Farm Park, 301. N. San Carlos Drive, Walnut Creek. Food, kids activities, rides, entertainment, more. $5. For times, information, www.thewalnutfestival.org/festival.php, 925-935-6766.
Concert Band performs
Diablo Regional Concert Band presents free concert, 7:30 p.m. Sept. 21, Martinez Veterans Hall, 930 Ward St. Melodies from "Funiculi, Funicula," "Fairest of the Fair," more. Refreshments. 925-451-6222.
Worm composting workshop 10 a.m.-noon Sept. 15, Mt. View Sanitary District, 3800 Arthur Road, Martinez. Learn efficient ways to convert fruit, vegetable scraps into nutrient-rich worm compost for garden, house plants. RSVP: 925-228-5635, ext. 19.
Brian Arthur Brown, editor of "Three Testaments: Torah, Gospel & Quran," speaks 10:30 a.m. Sept. 16, Hillcrest Congregational Church, 404 Gregory Lane, Pleasant Hill. Refreshments, discussion, book signing follows. 925-689-8260.
Red Cross blood drives
Red Cross blood drive 9 a.m.-3 p.m. Sept. 12, Diablo Valley College Student Union, 321 Golf Club Road, Pleasant Hill. Sponsor code: DVCPH.
For appointment, 800-733-2767, redcrossblood.org.
White elephant sale
Fundraiser 8 a.m.-6:30 p.m. Sept. 8; 8 a.m.-2 p.m. Sept. 9, Christ the King Church, 199 Brandon Road, Pleasant Hill. Variety of gently used items. Proceeds benefit church programs. 925-682-2486, www.ctkph.org.