If your wife is engaging in behavior that makes her a danger to herself or others, then she would likely meet the criteria for an involuntary commitment (though it varies state-to-state). The only way to know for certain would be to have her evaluated at a psychiatric hospital. Understandably, she may not voluntarily go the hospital. In that case, the alternative would be to call the police or a local crisis team. The police will take her to the hospital if they believe she needs to be evaluated or if they are concerned about her health or wellbeing. The local crisis team can come to the home and evaluate her psychological condition. I would recommend a local crisis team instead of the police, if possible, but you must do what is necessary to avert a crisis.
My sense is that even if she currently does not meet the criteria for an involuntary commitment, her situation may worsen. At this point, I would recommend contacting a local crisis team and discussing your problem with them. They can advise you about how to handle this. I believe that the seriousness of the situation could necessitate emergency assistance. The fear is that she may accidentally harm herself or another person, because of her high level of intoxication.
The crisis team can assist you with an emergency but you also need to deal with her longstanding problem of alcoholism. You should contact an interventionist or a family therapist who specializes in helping family members deal with an addict. Not getting this may mean that you are enabling her to continue her dangerous behavior. You do not want to enable her behavior in any way. If she cannot or will not stop drinking, then it usually is up to family members to intervene. It is a complicated problem and I recommend that you seek professional help. I hope that you can find the help that you and your wife need. Please take care.