Warnings appear as events in Apple Calendar, Google Calendar or Outlook and update on their own; revoked ones are cancelled. No account, no email: the link is anonymous.
The calendar keeps to risks that can really change a trip: orange and red weather and heat warnings, strikes in critical services, protests and high-risk events, and seasonal recurring dangers. It is the same list as the website. Knowing a risk does not make a trip safe; it just tells you what could happen.