in my experience - no, unless it was on archive.org.
If you change the source page, the cached pages elsewhere will update with those changes. Thus you can make a source page blank, and the cached pages will follow.
However, if you delete a source page outright, the cached pages still might remain intact as a record: thus better to blank out first for whatever the elapsed time of the cache might be until it refreshes - then delete - just so as to be safe in case the cache keeps deleted files.
If you change the source page, the cached pages elsewhere will update with those changes. Thus you can make a source page blank, and the cached pages will follow.
However, if you delete a source page outright, the cached pages still might remain intact as a record: thus better to blank out first for whatever the elapsed time of the cache might be until it refreshes - then delete - just so as to be safe in case the cache keeps deleted files.