The National Weather Service in Des Moines has upgraded the Excessive Heat Watch they issued Tuesday to a warning. The Cedar Valley will see heat index values in the triple digits the next three days.

The Excessive Heat Warning goes in to effect at 1:00 PM this afternoon (July 20, 2016), and it will continue until Saturday at 7:00 PM. The Excessive Heat Watch for the area is no longer in effect.

Over the next three days, air temperatures will reach the lower 90's, and the humidity will hang in the the 90-percent range. Heat index values will climb to 105 to 110 degrees.

An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur. The combination of hot temperatures and high humidity will combine to create a dangerous situation in which heat illnesses are likely.

They advise that we should, “suspend all major daytime outdoor activities if a warning is issued. If you do not have air conditioning, locate the nearest cooling shelter or discuss staying with nearby family or friends who have A/C.”

Possible Heat Disorders for People in High Risk Groups (as per the National Weather Service)…

  • 130°F or Higher – Heat/Sunstroke HIGHLY LIKELY with continued exposure
  • 105°F – 130°F– Sunstroke, heat cramps, or heat exhaustion LIKELY, and heatstroke POSSIBLE with prolonged exposure and/or physical activity
  • 90°F – 105°F– Sunstroke, heat cramps, or heat exhaustion POSSIBLE with prolonged exposure and/or physical activity
  • 80°F – 90°F – Fatigue POSSIBLE with prolonged exposure and/or physical activity