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.
Dozens of people in Council Cluffs are reporting a mystery noise on Facebook, some even going to the police.
People are taking to Facebook, wondering what is causing loud boom noises in the western portion of Council Bluffs. For, Kathy Batie, it's been happening once a week for about two and a half months.
Council Bluffs Police say they've responded to a few calls for loud booms, but when they go out to investigate, they find nothing.
Still, people are convinced something is going on.
Council Bluffs Police say their best guess is fireworks.