In the Project SAFETY™ Settings, with 'Safety Tracking' turned ON, the 'Safety Bulletin' option will become enabled. Using the Safety Bulletin as a Safety Manager, you can create Bulletin for safety alerts and send out the alert to selected groups or everyone.
The videos below will guide you on how to create safety bulletins, and send out alerts:
Air Quality Alert Configuration
How to Send New Alert, Configure Air Quality Alert, SMS Configuration in Safety Bulletin