July 29, 1999. It's a question that leaves climate scientists cold. A good hot heat wave in the summer is probably not good evidence that global warming is actually occurring.
Scientists say no one weather event can be considered proof of global warming.
You have to look at decades, even centuries of data to establish a trend. But that doesn't stop politicians from speaking out. As you can see from this sweltering heat, that the vice president is right. The climate of our country and our globe is changing. The president made those comments during last summer's heat wave in the middle of the hottest year on record.