Thats how the KJV translators translated it there obviously. They didnt do such a stellar job though. Words in all languages carry multiple meanings and we must use contexts to determine best fits.
The Hebrew word is "ra" meaning in that context "acts of adversity". Calamity is also an acceptable definition.
The Hebrew word ra appears in scripture 663 times. In 442 cases, it was translated as "evil." Six times as "affliction" and four times as "adversity." Not once as "calamity" but Gesenius says "adversity, affliction, bad, calamity, displease(-ure), distress, evil((-favouredness)".
Ra derives from the Hebrew word ra`a` meaning
AV — evil 20, evildoer 10, hurt 7, wickedly 5, worse 5, afflict 5, wicked 4, break 3, doer 3, ill 3, harm 3, displease 2, misc 13
Recall that the Egyptian sun god was named Ra.
Ra was the sun god. He was the most important god of the ancient Egyptians. The ancient Egyptians believed that Ra was swallowed every night by the sky goddess Nut, and was reborn every morning. The ancient Egyptians also believed that he travelled through the underworld at night.
We've discussed this several times. God creates "acts of adversity" for those who reject and contend with him - like you. God is NOT evil and yet you state:
"but the Creator of such evil must Himself be evil to have caused it"
And that is certain blasphemy.
Enjoy this life. Its all you will ever have. You will die, and then theres literally hell to pay.