All but two of Alabama’s 67 counties were under either an excessive heat warning or heat advisory on Saturday, and those oppressive conditions are likely to carry over into Sunday as well.

The National Weather Service is forecasting air temperatures to climb into the mid- to upper 90s today across the state.

Here is the forecast for today:

Humidity levels will remain very high as well, and the combination of heat and humidity will make it hazardous for those exerting themselves outside for long periods of time.

Sunday could even be a degree or two hotter in some spots, and excessive heat warnings and watches were already in effect for much of the state.

Here is the forecast for Sunday:

Rain and storms — some of them severe — are expected but likely won’t arrive until later this afternoon, after the heat has already reached its peak.

Here are the heat warnings and advisories in effect for Alabama by region:

NORTH ALABAMA

* Heat advisory from noon until 8 p.m. Saturday for Cullman, Lauderdale, Colbert, Franklin, Lawrence, Limestone, Madison, Morgan and Marshall counties.

Heat index values up to 109 are expected.

CENTRAL ALABAMA

* Excessive heat warning from 10 a.m. Saturday until 9 p.m. Sunday for Lamar, Fayette, Walker, Pickens, Tuscaloosa, Jefferson, Shelby, Sumter, Greene, Hale, Perry, Bibb, Chilton, Coosa, Tallapoosa, Marengo, Dallas, Autauga, Lowndes, Elmore, Montgomery, Macon, Bullock, Lee, Russell, Pike and Barbour counties.

Heat index values up to 113 are expected.

* Heat advisory from 10 a.m. Saturday until 9 p.m. Sunday for Marion, Winston, Blount, Etowah, Calhoun, Cherokee, Cleburne, St. Clair, Clay, Randolph and Chambers counties.

Heat index values up to 109 are expected.

SOUTH ALABAMA

* Excessive heat warning from 11 a.m. until 7 p.m. Saturday for Choctaw, Washington, Clarke, Wilcox, Monroe, Conecuh, Butler, Crenshaw, Escambia, Covington, Mobile and Baldwin counties.

Heat index values up to 115 are expected today.

* Excessive heat warning from 10 a.m. until 7 p.m. CDT Saturday for Coffee, Dale, Geneva, Henry and Houston counties.

Dangerously hot conditions with heat index values up to 117 are expected.

* Excessive heat watch for Sunday for Choctaw, Washington, Clarke, Wilcox, Monroe, Conecuh, Butler, Crenshaw, Escambia, Covington, Mobile and Baldwin counties.

Heat index values up to 113 will be possible.

* Excessive heat watch for Sunday for Coffee, Dale, Geneva, Henry and Houston counties.