Frigid air expected to bring lows not seen in 2 decades.
Latest victims in Ballwin and East St. Louis.
Drought conditions abound around much of Missouri, and lawns and grass are taking a beating.
NWS: Hottest July on record in Missouri since 1936.
90% of St. Louis city schools now have central air conditioning.
At least one area electric provider asking customers to cut back on energy usage.