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Citizen Corps: On Twitter @citizen_corps or online at www.ready.gov/citizen-corps Response teams: Online at www.ready.gov/community -emergency-response-team. In San Francisco, http://sf-fire.org/ neighborhood-emergency-re sponse-team-nert

Sara Gobets / Special to The Chronicle 2020 CERT volunteer Kay Blackwolf helps Erik Rose load a free case of water into his car in Boulder Creek (Santa Cruz County) in September.