The other day I had a business trip in Vancouver, BC, and I drove up in my P85D from Woodinville, WA (near Seattle). I've done this trip a few times before so I didn't think much about it or have any real range anxiety. What I do is charge to full overnight, drive up to Vancouver in the morning, meet with a business partner for a few hours and then hit the Burlington, WA Super Charger on the way back home. Normally I get back to the Burlington SC with about 12-16% charge, but this time, I arrived with only 4% and quite a bit of anxiety. What was different this time is that the weather was warmer than previous trips (54 F when I left home, and around 71 F when I left Vancouver). So while you'd normally think that's an ideal temperature for max range, I learned a new lesson here that I thought I'd share. Upon arriving in Vancouver, I parked in the partner's parking lot and checked the expected charge remaining to the Burlington SC. The car thought I'd get there with 16%. "Cool," I thought, "I should be good." I met with the partner for about 4.5 hours and then opened the Tesla app on my phone on my way out of the building. 112 degrees F in my car! Upon entering the car I checked the estimated charge remaining to get to the SC. "Drive below 55 to reach your destination!" Doh! What happened, as you can imagine, was that the battery cooler had turned on during my meetings and had drained the battery in the process. OK, lesson learned. Should I try to make it to the SC? I got on the highway and the estimate soon changed to 5%. I drove around 60 MPH for several miles and managed to get the estimate up to 6%. Most of the way to the SC it hovered around 5 or 6%. After a couple small hills, it hit 4% and remained there until I pulled into the SC, breathed a sigh of relief and charged up for the last leg home. Yes, I could have hit a non-SC to get a splash charge, but none of them were on my direct path back to the SC, and they all looked a bit dubious on PlugShare. So, the moral of this story is "don't park your car in direct sunlight (unless it's very cold outside - even 70 degree weather in direct sunlight can equal 100+ degrees inside the car) if you're pushing 20% or less remaining charge back to your next charger." The car will do what it needs to keep the battery healthy and happy, potentially at the "expense" of the driver's nerves.