Last week’s storm system took down numerous power lines in a canyon above Stinson Beach, cutting electricity to nearly 1,000 homes from Wednesday morning until Friday evening while PG&E crews and the Stinson Beach Volunteer Fire Department worked around the clock. “It was awful,” said Betsy Wood, a realtor with Seadrift Realty, which canceled all vacation rentals for the three-day weekend, though half of the renters ended up coming anyway on Saturday. PG&E spokeswoman Deanna…