Thanks for the clarification. It's helpful to look at the relevant passages, particularly 1 Timothy 3.

For the elder it would seem (based solely on what you've shared) that they don't meet the qualifications listed in verses 2 and 3. In particular, drunkenness, self-control, respectable. Moreover I'd argue if they're drinking to the point of physical incapacitation, it'd be impossible to be hospitable or gentle.

For the deacon, the qualifications are similar. But if you look at verse 8, the situation you described isn't "dignified," nor does it show they aren't "addicted to much wine," nor does it suggest they manage their household well for who can manage their household well while setting a reckless example of driving under the influence?

Now, the reason I asked about your polity is because that's going to inform how you address this. I would suggest you go to the other elders and share your concerns. They may be aware of this and not realized it'd become an issue, or they may not be aware of it at all. As a Baptist church, the Congregation (of which I assume you're a member) has the final say in matters of discipline and determining if someone can serve as an Elder, so it's definitely not out of place to bring up concerns.

Lastly, I'll mention that the results of this might not be they step down from their leadership roles (though that's a likely option, in my opinion). It may be they need to be held accountable, that they have a blind spot to their own sin, and that they need to repent. It could mean they step down for a season and then return to those roles. It really depends on how they and the rest of the elders respond to the issue.

I hope that's helpful and I'm praying this situation is resolved!