It is a criminal offence to be drunk in charge of a minor or minors in a public place and to be drunk in charge of a minor or minors in a private establishment is the criminal offence of child neglect.
If, for example, a neighbour or a passer-by had heard your dc screaming and called the police, and they had arrived to find her pissed out of her skull incapacitated by her consumption of alcohol, your dw would most probably have been arrested and taken to the police station together with your dc, where they may have been temporarily placed in the care of SS pending further investigation.
Given the incident with the bath, I assume your dc are too young to have got themselves out of harm's way and, if this is the case, it is all the more reason why they should not be left alone with your dw at the present time and it would seem expedient for you to become their primary carer until their dm has sought, and responded to, treatment for her addiction to the demon drink.
In the absence of any relative or trusted friend who can take care of your dc while you are at work, if they are school-age investigate the possibiity of after school clubs or perhaps another parent would collect them and keep them safe until you get home or, if they are too young for school, enrol them in a day nursery or seek a regstered childminder to care for them.
Needless to say, your dw needs help but, as she can't be forced to have therapy/treatment, only she can take the first step towards sobriety.