Thank you very much Saumya.
I took your advice and manually hard-coded the Cache Control headers for dynamic pages.
Hopefully, this will protect my site from future outages.
Thanks again!
# Header always set Cache-Control “expr=%{resp:x-wp-cf-super-cache-cache-control}” “expr=resp(‘x-wp-cf-super-cache-cache-control’) != ””
Header always set Cache-Control “s-maxage=31536000, max-age=600, stale-while-revalidate=86400, stale-if-error=604800”