A severe heat wave is engulfing the Midwest, with extreme temperatures and high humidity prompting warnings across several states, particularly Iowa. As heat indices soar into triple digits, outdoor activities are being canceled, and cooling centers are opening in various locations including Sioux County and Iowa City to provide relief. Residents are urged to take precautions due to ongoing excessive heat and humidity, which may persist into the weekend. Local authorities and experts are sharing safety tips to help everyone cope with the oppressive heat.