An (un)Deathly storm and Infestation are both Pay What You Want modules published by Sacrosanct Games. Sacrosanct, led by Rob Waibel, have been around for a good long time, established in 2002 and claiming that they've been kicking around game design for almost thirty years. The two modules are the first installations of a series of largely system-agnostic one-page fantasy adventures, and have been pitched at low-level characters.
That means I need to make a bit of a disclaimer before going on with the review. I'm not here to determine the validity of the One Page Dungeon Contest. (Though for what it's worth, I think the contest encourages scenario designers to test the limits of their creativity and brevity, qualities very useful in designing a scenario of any length.) My purpose in reviewing is to consider how useful the product is to a DM for running a game. To put that another way, I'm concerned that I'm doing the gaming equivalent of talking about how good wearable art is for hiking.