The 57 year old collapsed while on his mail route in Independence.
The latest confirmed death was a male born in 1956.
Authorities say the death of a 60-year-old Fairmont City woman is the fourth heat-related death in the Metro-East.
State officials say heat and drought caused the death of about 20,000 fish.
… and fourth driest July on record.
There have been 28 confirmed heat deaths in Missouri this year.
The hot, dry weather is taking a toll on water mains.
With a high of 107 and a low of 86, three records were broken on July 25.
The cost-share program will be available to farmers whose production is being severely impacted by the current drought.
85 St. Louis residents this summer have sought medical relief from the heat.