I started this run hoping to run 11 miles between 7:00 and 7:30 per mile. After five miles, I was losing steam quickly due to dehydration. It was 75 degrees with high humidity, which made for a tough run. I knew I was dehydrated but didn't have access to water, so I just had to suffer through the last 5-6 miles. Ended up at 8:00/mile.
I learned the valuable lesson that when it's hot with high humidity to go out at a slower pace (and to drink as much as I can before I start my run)