", ▁resulting ▁in ▁a ▁higher ▁frequency ▁of ▁torn ado es ▁in ▁states ▁including ▁Illinois . ▁In ▁ 2 0 1 5 , ▁The ▁Washington ▁Post ▁reported ▁that ▁" by ▁the ▁end ▁of ▁the ▁century ... ▁Chicago ▁could ▁become ▁a ▁lot ▁like ▁today ’ s ▁Texas , ▁having ▁even ▁more ▁days ▁per ▁year ▁above ▁ 9 5 ▁degrees ▁than ▁the ▁L one ▁Star ▁State ▁currently ▁does ". ▁ ▁He avy ▁precip itation ▁and ▁flo oding ▁ ▁" Ch anging ▁climate ▁is ▁likely ▁to ▁increase ▁the ▁frequency ▁of ▁flo ods ▁in ▁Illinois . ▁Over ▁the ▁last ▁half ▁century , ▁average ▁annual ▁precip itation ▁in ▁most ▁of ▁the ▁Mid west ▁has ▁increased ▁by ▁ 5 ▁to ▁ 1 0 ▁percent . ▁But ▁ra inf all ▁during ▁the ▁four ▁wet test ▁days ▁of ▁the ▁year ▁has ▁increased ▁about ▁ 3 5 ▁percent , ▁and ▁the ▁amount ▁of ▁water ▁flow ing ▁in ▁most ▁streams ▁during ▁the ▁worst ▁flo od ▁of ▁the ▁year ▁has ▁increased ▁by ▁more ▁than ▁ 2 0 ▁percent . ▁During ▁the ▁next ▁century , ▁spring ▁ra inf all ▁and ▁average ▁precip itation ▁are ▁likely ▁to ▁increase , ▁and ▁severe ▁ra inst orm s ▁are ▁likely ▁to ▁intens ify . ▁Each ▁of ▁these ▁factors ▁will ▁tend ▁to ▁further ▁increase ▁the ▁risk ▁of ▁flo oding ". ▁ ▁Illinois , ▁Ohio , ▁and ▁Mississippi ▁R ivers ▁ ▁" F lo oding ▁occasionally ▁threat ens ▁both ▁navigation ▁and ▁river front ▁communities , ▁and ▁greater ▁river ▁flows ▁could ▁increase ▁these ▁thre ats . ▁In ▁ 2 0 1 1 ,