Well, I guess she's just that...wait for it... cool.
Although, that's over a period of months. Certainly, the energy is impressive. But the power... Wait. 6.4 MILLION kW?!
we estimated the energy of the total time period to be quite a bit higher
it's not just enough to chill the air, you have to keep it chilled against incoming sunlight, and against loss due to convection and conduction.. the variance is caused by:
how much the average temp per month can vary (say was it a cold summer to begin with?)
how big the are was.. we can estimate the cylinder (with the isle at the center) covering Chicago, but where is murphys house in the suburbs?