It is summer - no doubt about that. Last evening a powerful thunderstorm flared up over 42N land, dumping much needed rain and producing winds at up to 65 mph. Today, like yesterday, is again hot and very humid. How hot is it you ask? Hot enough for the air above the steel rails of the Union Pacific railroad at Lisbon, Iowa to produce mirages of wavy lines. Look for yourself. The only photo manipulation to this image is color correction and cropping.