Perhaps when every little thing stops being hyped as evidence of global warming, the cause will become more believable.
Case in point: two summers ago we were informed of the number of consecutive days that the temp in Dallas was 95 or more. Each day's report had the not so subtle hint about global warming. When the consecutive day streak finally broke at about 28 days, we learned that the record number of consecutive days of 95 or over was some number in the 40s, and had been set 20-30 years earlier.
Not to mention some of the activists lie their *es off. I remember Ross Gelbspan, author of The Heat Is On, in a column for the Boston Globe telling people that two feet of snow had fallen in Los Angeles because of global warming. I live in Los Angeles. We did not see a flake of snow. Oh, later on it turns out he meant up in the mountains, 60 miles away. I think there's a ski resort up there so presumably the snow wasn't a big shock...
1980. The year my younger daughter was born in a northern Dallas suburb. In mid August no less. I believe that summer also set a record for most total days over 100 degrees.