Indeed, humidity levels are much higher outside of major cities. For instance, Freeport has seen dewpoints of more than 80° in the past few days while surrounding (more urban) cities are in the 74-78° range. This has to do with the evapotranspiration from cornfields. During middle July, our crops are at their mature, healthy stage. As they take moisture from the ground and roots, the healthy leaves give off the moisture during the day (faster during higher temperature). In fact, each corn stalk gives off 53 gallons of water to the atmosphere in it’s lifespan.
Because there are about 20,000 corn stalks in each acre of land, that means that one acre of corn will yield 1,060,000 gallons of water into the air! That translates to A LOT of humidity!
Stay safe during these extended humid time. While heat waves are deadly, the deaths are preventable if you take the right precautions! Above the current heat index map as of 2:50pm. -ES
This post was written by Eric Sorensen on July 20, 2011