Another Saturday, another day of enduring sweltering heat.

The National Weather Service calls for a high today of 99 degrees, as the Lawrence area toils under an excessive heat warning that has been extended once again — this time until at least 7 p.m. Friday.

The weather service cautions that the “dangerously hot weather” will continue through next week in northeast Kansas. Blame a “strong upper level ridge” continuing to build into the central plains, pushing high temperatures to near or above 100 degrees and producing afternoon heat indices commonly ranging from 105 to 112 degrees.

Don’t expect much relief when the sun goes down, either: “Overnight lows will remain quite warm as well,” the weather service says, “with readings only cooling to the upper 70s and lower 80s.”

People are advised to take special care when outside, as prolonged exposure to the heat can lead to heat exhaustion, heat cramps and stroke. Wear lightweight and loose-fitting clothing, drink plenty of water, take advantage of shade and limit strenuous activities to the early morning or evening hours.

Forecasters don’t expect much relief at all anytime soon. The weather service expects highs of 100 degrees Sunday, Monday and Tuesday in Lawrence, then 102 Wednesday.