Flat 20 Mile Hot-Run

Today's run should have included electrolytes. Instead I started having visual disturbances, and was very thirsty even though I was consistently drinking. Alas, I'm acclimatizing to the heat.
This run was very flat, and included too much traffic. Across the street from a shooting range, was a very nice man who filled up my water bottle. I don't like guns.
I thought I'd branch out and do a run over in the Davis neck of the woods, but can't say I'll be returning for another go at this location.
Even still 20 miles in 3 hours, and I walked a good portion of a mile (not all at once) when I ran out of water.