According to the Atlantic article above, there are a number of emergency powers in force right now.

However, the act which covers those requires that Congress review those declarations every six months to see if they are still needed, and any new powers must declare their scope and time.

Congress has not reviewed any of those declarations in many years.

I am not a lawyer, but it would seem every one of them is in violation of the law now, and could be struck down as unlawful. I don’t know how one would go about that though.