In the field that has been turned in to a parking lot for university graduation services, I link up my v-dipole, dongle and android. A maintenance man or security guard sitting in a blue van looks on with a bemused expression, but mostly he ignores me and talks on the phone. The air is warm for the first time in weeks and it is such a relief from the cold, rainy, at times torrential rain we have had in the U.K. Later in the afternoon I show my satellite image to SB, a physical geographer who specialises in studying past climates through tephra (volcanic ash). He points to the wavy line of the increasingly wobbly jet stream and explains how, with the poles warming faster than the equator, the difference in temperature and pressure that stabilises weather and holds the jet stream north is decreasing, causing the jet stream to curve and bend south more and more, bringing moisture laden air from the Atlantic to Northern Europe - this describes our recent weather experiences. Now that I’ve seen the curve of the jet stream with SB’s help I want to look back to all of the past imagery and try to spot it. Meanwhile, he says, ‘anywhere below 40 degrees (latitude) is burning’. Soph is just back from holiday and describes a level of heat in Croatia over the last week that was at the limit of their physical health. It doesn’t take much for heat to stress London- on my tube journey home, the air is so stifling that people are visibly haggard, some using makeshift fans and others flushed read and eyes closed, waiting for their train.