Hey, so! I have had issues with "inside voice" my whole life. It took years of active attention to learn how to manage my own volume, and when I'm excited or upset, I may still not realize how loud I'm being.

Right now, as @snarkbat so accurately pointed out, everyone's feelings are really big, and some of those feelings are just getting bigger due to stress, uncertainty, and yeah, proximity to people who may not be easy.

So if someone you think you're talking to rationally suddenly starts yelling at you, pause, take a breath, and ask "Was I yelling?" If the answer is "yes," you didn't know, but they were escalating to match you. If "no," this could still break the back of the budding fight.

Because EVERYONE has volume issues when they're stressed. EVERYONE. It's not a magical thing that you're immune to just because you've never been under this kind of pressure before.

De-escalation is a game we all can play.