A mudslide, a flood or a snowstorm is incapable of “assaulting” anyone. In the English language it refers to “a violent physical or verbal attack” according to the dictionary. A quaint tome that evidently has fallen in to disuse in the newsroom.
I would even take exception to the dictionary’s inclusion of a “verbal” attack being assault. As every school child knows “Stick and Stones….”. Know one has ever been physically injured by a cutting remark or crushed by heavy praise. Criticism may hurt your feelings, but so far, hurting someone’s feelings is not a crime. In a legal sense, assault is a physical attack, being yelled at is harassment, and then only if it puts you in fear of being physically harmed.