The pronunciation of "regent" is not correct. (1) there should be no accent in either syllable; (2) the pronunciation of the first "e" is like an English "a", e.g. stay; (3) the pronunciation of the second "e" is like the English "u" in her, sir; (4) the word as pronounced does exist, and describes someone who governs or rules.
PatriekVro The following was found in Merriam-Webster:
formal 1 : after this : from now on<pre>
Hereafter the two companies will operate in full partnership.</pre>
— often used in legal documents<pre>
my client, hereafter the plaintiff [=my client, who will be called “the plaintiff” from this point onward]</pre>
2 : in a future time or state<pre>
We don't know what will happen hereafter.</pre>
While I believe "hereafter" is not incorrect, it is too formal to combine with a rain event, or whatever preceded it.