Last year, I renovated a lawn which included bringing in several loads of topsoil. Well the lawn looked great that is up untill this week. It was the best looking lawn in the subdivision but now, It seems as if everywhere I placed soil, the grass has turned brown and looks like it has died. I think that the root system has not been able to penatrate the harder soil and now that the heat has hit, is killing out the grass. What can I do??? Can I areate the yard this time of year or will it make matters worse? i took a soil test and it is in perfect condition as far as needing anything. Please help thanks.