ST. LOUIS, MO (ST. LOUIS PUBLIC RADIO) - The same weather system that brought almost three weeks of dangerous heat to the St. Louis region in July is causing record-setting temperatures this week as well.

But relief is on the way.

National Weather Service meteorologist Mark Britt says the large area of high pressure that’s been sitting over the southern United States for most of the summer will occasionally expand.

When that happens, the heat that’s been blistering Texas for months creeps into the Midwest.

But Britt says because we’re a few weeks closer to fall, this current heat wave won’t stick around as long.

"We’re starting to see a little stronger storm systems move around the ridge of high pressure and so that allows cold fronts to stay through Missouri and Illinois for a bit longer than they did earlier," Britt said.

Britt says longer-range models show below-normal temperatures for most of September, though he says a few hot days are still possible.

Rachel Lippmann, St. Louis Public Radio

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