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.
Eastern Iowa officials continue to watch the weather and swollen rivers and lakes closely.
A number of low-lying areas along the Mississippi River and around Iowa City have already been flooded, but reservoirs and levees area generally containing the water.
Emergency management officials say the main threat over the next several days will be rain. A significant storm could worsen the flood outlook, but exactly where rain falls will be important.
The forecast calls for rain later Sunday, and there is a chance for more rain Monday and Tuesday.
Coralville Lake north of Iowa City is now expected to crest Tuesday, and remain about four feet below its emergency spillway.