Interesting information on national and regional grid reliability from the AR community.  If you are in the know, you can predict demand related power outages several hours in advance.  The resources in this video are below-

NERC 1 pager:

https://www.nerc.com/pa/RAPA/ra/Reliability%20Assessments%20DL/NERC_LTRA_Infographic_2023.pdf

NERC full report:

https://www.nerc.com/pa/RAPA/ra/Reliability%20Assessments%20DL/NERC_LTRA_2023.pdf

Some regional examples: 

CAISO:

https://www.caiso.com/

 MISO:

https://www.misoenergy.org/