Navigating casual Friday

For casual Friday at work (everyday), I like to turn to my Forever 21 maxi dress. It is amazingly comfortable, and it is also a great option for any Friday night plans that may come up. Wearing it with a cardi or cover up, to me, makes it work appropriate. Some may disagree, but my office is pretty casual. Some people wear jeans everyday. I choose to dress up during the week, but opt for something casual Friday, which is what the majority of people do. Everyone associates casual Friday with jeans. However, during the recent heat wave (99 degrees) we have been experiencing, jeans might not be the most comfortable option. So I am just curious, what can you get away with at your office? Is it just me, or are policies becoming more relaxed?
Forever 21 dress; J.Crew men’s button down; Sam Edelman sandals; Ray Ban aviators; Vintage, Forever 21, Macy’s, J.Crew jewelry