The heat wave is being blamed in the death of an 80-year-old St. Louis County woman.
The county health department says the woman was found Aug. 2 in her Brentwood home. A window air conditioner was not working and all the windows and doors were closed. Authorities say the temperature inside the home was 96 degrees.
It is at least the fifth heat-related death in St. Louis County this year.
Updated 3:18 p.m. with approximate boundaries of outage - map below
A planned power outage, announced Wednesday afternoon by Ameren, has, at our last check just before 3 p.m., affected approximately 4,800 people in the Missouri portion of the St. Louis area.
The outage was necessary, Ameren said in a statement, to make repairs following a cable failure Tuesday night. Those repairs, Ameren said, are being made to "prevent a more widespread and extensive outage."