The National Weather Service continues the heat advisory through Tuesday afternoon. Temperatures once again on Tuesday will rise to the upper 90s however high humidity will make it feel like 105 to 110 degrees.
Federal investigators are still looking for the cause of a medical helicopter crash in northern Iowa that killed three people.
Pilot Gene Grell, nurse Shelly Lair-Langenbau and paramedic Russell Piehl died when the helicopter crashed north of Ventura near Mason City Wednesday night. They were on the way to Emmetsburg to pick up a patient.
Lair-Langenbau and Piehl worked for Mercy Medical Center-North Iowa in Mason City.
The CEO of the medical transport company that owned the helicopter says the pilot didn't make any emergency call. The helicopter had a satellite tracking system that monitored its position and other information instead of the traditional onboard black box.
Weather was overcast with 10-to-15 mile per hour winds at the time of the crash.