The Department of Homeland Security has a subsidiary that focuses on Cybersecurity. The DHS subsidiary is named Cybersecurity and Infrastructure Security Agency (CISA), link here: https://www.cisa.gov/. In addition to numerous educational resources, CISA has a Cybersecurity Alert Sign Up service available to the public, link here:
https://public.govdelivery.com/accounts/USDHSCISA/subscriber/new?qsp=CODE_RED