Here's a link to more info from the local paper.
http://www.greenbaypressgazette.com/section/2012marathon
The previous post is correct...Sean Ryan does have a great reputation, and I believe deservedly so. To highlight the issue, Ryan also is the RD for the Door County 1/2 Ironman. Temps got into the high 90s for the event last summer and it wasn't cancelled.
The issue is marathons and 1/2s catering to the back-of-the-pack or under-prepared runners. I'm generally a "big tent" kind of guy when it comes to running. The more, the merrier...better to run slow than not at all. But at the same time, there has to be some personal responsibility. If the conditions are too much for you, then drop out...live to run another day. Don't count on the RD to stop the race for everyone for your benefit.
I was in Green Bay to watch my wife run the marathon. She had a good training cycle and some good preparation races this Spring. But afterward, she said she knew at the start line that she wasn't going to hit her goal pace. So she ran what felt like a sustainable pace...until they told her at 18 the race was over. She mostly walked a couple miles trying to decide what to do, and then just jogged it in to the finish. Why penalize the runners that run a smart race?
We saw my wife at Mile 4 and then had to wait probably 20 min until there was a big enough gap to cross the course (had the kids in a bike trailer). It was an eye-opening experience. We saw some runners completely drenched, walking, looking exhausted. This was 4 miles in, temps in the mid 70s with humidity in the mid 60% range. Sweet Jesus, people! Know your limitations!