Pls help for TKR

Hello guys, i am from india and planning a TKR for my mother for both the knees. I am free from work these days and hospitals too arent much crowded plus the covid cases have declined so we planned to get the surgery this week bt i have doubt that the whether currently is of peak summer and heat is at its peak. i have heard that chances of infection in tkr increase in this hot and humid weather. i am really confused should i carry on the with th surgery or wait till early fall months. pls help