It's highly unusual for death rates to increase in first world countries - the usual trend is for people to live longer. However, American white women are now dying younger than they once did. This is particularly true for rural white women. Black women, in comparison, have continued the expected trend of living longer.
Here are some graphs from the Washington Post illustrating the phenomenon. The first one shows the changes in the mortality rates from 1990 onwards for those aged 30 to 34:
You can see that things have improved considerably for black men and women in that age group. For black women, for instance, the mortality rate has declined by 40%. The situation for white men improved until about the year 2000 and has then declined. For white women mortality has worsened by over 20%.
The situation is worst for white women living in rural areas or small cities:
You can see that the trends have been bad for all whites in this age group since about the year 2000. However, it is worst for rural women, whose mortality rates have increased by well over 40%.
Why are white women dying younger? For the 30 to 34 year olds, it is mainly due to drug overdoses, with suicide also being a factor. For older white women, cirrhosis of the liver (heavy drinking) is another big factor, as is heart disease.
The graph above shows those causes of death that have increased since the year 2000. You can see that for both urban and rural women aged 50 to 54 that there has been an increase in deaths from drug overdoses, cirrhosis of the liver and suicide, and also from various lung diseases.
The question that is not fully answered in the Washington Post article is why white women are succumbing to drugs, alcohol and depression - particularly at a time when black women's health outcomes are significantly improving.
I'm not going to attempt to answer that question now. I'd just point out that feminism does not seem to be making white women any happier.