BC Hydro will be testing its siren system along the Puntledge River in the Comox Valley on May 6 and 7. “We are conducting the test to ensure the public warning system is operating as intended. Over these two days, we will manually test each siren,” a notice from BC Hydro says. “Individual sirens may activate several times throughout the day, with each activation lasting a few minutes. There are no flow changes associated with testing. BC Hydro …