Anyone- I live in southern California, and I have a problem with my yard which started last year and looks like it is continuing again this year. As soon as the temperature gets warm (say around 80) spots in my grass turn a dark rich emerald green, then die a couple of days later. The problem showed up last year, and over the winter I re-seeded the affected areas and had grass growing. One or two weeks ago, the temp hit 80 and now the problem is back in the exact same areas. Any ideas what this is, or where I can go to find help?