More relentless August heat is in the forecast for Alabama on Saturday, and heat advisories will be in effect.

The National Weather Service is forecasting air temperatures to climb into the 90s across a large part of the state today. North and parts of north-central Alabama will be in the lower 90s, but south and especially southwest Alabama will reach the upper 90s.

Here are the forecast highs for Saturday:

The forecast for Sunday is similar:

Those temperatures, combined with high humidity levels, could send the heat index, or “feels like” temperature, as high as 112 degrees by this afternoon, according to forecasters.

The weather service said that heat index values over 105 degrees may cause heat exhaustion and heat stroke if outside for a prolonged period of time.

Today’s heat advisories affect mainly western Alabama.

There could some rain and storms to help mitigate the heat, but it’s unclear when they will arrive.

NOAA’s Storm Prediction Center is forecasting a Level 1 out of 5 risk for severe weather for much of Alabama today, which means that isolated severe storms will be possible. The best chance for storms may not arrive until later today or tonight.

The strongest storms could have damaging winds and heavy rain.

Here is a look at the heat advisories in effect for Alabama on Saturday:

CENTRAL ALABAMA

* Heat advisory until 9 p.m. Saturday for Lamar, Fayette, Walker, Pickens, Tuscaloosa, Sumter, Greene, Hale, Perry, Bibb, Marengo, Dallas, Autauga, Lowndes, Elmore and Montgomery counties.

The National Weather Service in Birmingham said heat index values up to 109 are expected in those areas.

SOUTH ALABMA

* Heat advisory from noon until 7 p.m. both Saturday and Sunday for Clarke, Wilcox, Monroe, Conecuh, Butler, Crenshaw, Covington, Choctaw, Washington, Escambia and Mobile and Baldwin counties. The National Weather Service in Mobile said heat index values up to 112 will be possible.