Johnson has 36 points on 13-for-19 shooting from the field to lead the Hawks to an 84-55 lead over the Bucks through three quarters at Philips Arena.
Josh Smith and Al Horford have 15 points each for the Hawks, who are shooting 61-percent (35-for-57) from the field in the makeup game that turned into a rout.
About the only thing that's separating Johnson from what could be a career-best night is the score. Atlanta is killing Milwaukee. The Hawks play the Denver Nuggets tomorrow and Johnson might be better off resting up rather than posting six more points to tie the career high of 42.
Atlanta holds a 33-23 edge on the glass through 36 minutes.
Andrew Bogut has 21 points and 13 boards and Carlos Delfino posted 13 for the Bucks, who are shooting just 38-percent (23-for-61) from the field.