With summer barely begun, forecasters are already issuing heat advisories for much of the Southeast.

A heat index of 103 degrees was expected Monday in southeast Mississippi, south central and southwest Alabama and southeast Georgia. It’s expected to rise to between 103 and 109 through midweek and decrease slightly the next few days.

In Atlanta, city officials said 11 public swimming pools will remain free for everyone until Thursday due to extreme heat.

National Weather Service forecaster John Moore III in Memphis, Tennessee, says it’s unusual for temperatures there to rise so high in June. Temperatures nearing 100 degrees are expected in Memphis by Tuesday. He said normal is closer to 90 degrees.

A heat index between 100 and 104 degrees is expected along the North and South Carolina coasts.