Global Warming?

Bill Maher was on The Tonight Show a few days ago and was making one of his uncomfortable joke/political statements about how it was really hot for a few days there in California, which was a clear sign of global warming. Well, it was really hot here too and now it's 78 degrees on August 11th and not supposed to break 90 degrees for at least the next 10 days. So what happened to the global warming? Isn't that supposed to be a constant, not something that comes in short bursts? I mean, not for nothing, I know the environment is indeed screwed up, but let's not be so dramatic. It's not like the weather is staying at 105 degrees every day for months on end. Sheesh.