Water and saline are the only thing that go in eyes.
Flush temperature burns for at LEAST 15 minutes. Brush off dried chemicals from chemical burns because water may activate the chemical.
Traffic cones over a canister can reduce tear gas range.
Wear ear protection if available. LRADs are no joke and will make you go deaf. Over the ear is best.
Write your “in case of emergency” in permanent marker on your body. Also any bail fund/pro bono lawyer.
You can and will be identified if you do not cover your face and any identifiable markings/hair color. KN95 plus a bandana or other cloth over the mask.
Medics will be primary targets. Protect them.