SF's emergency siren system is being upgraded, not retired, though the project is delayed and over budget: <https://www.sfchronicle.com/sf/bayarea/heatherknigh

SF's emergency siren system is being upgraded, not retired, though the project is delayed and over budget: <https://www.sfchronicle.com/sf/bayarea/heatherknight/article/This-is-only-a-test-S-F-s-emergency-16804551.php https://www.sfchronicle.com/sf/bayarea/heatherknight/article...>