mrbootybreath:

im gonna make a post here in non caps so i can help people remain calm

• everyones theme has been erased and replaced with what seems to be a default theme, and everyones html has been erased

• some themes still work apparently? but mostly everyones has been erased

• you have not been hacked and your blog has not been purposefully sabotaged

• its best to wait patiently until tumblr fixes this

• and when that happens, you can recover your theme here https://www.tumblr.com/themes/recover but right now that wont work

so just wait patiently and calmly until this is resolved and do not panic!