PORTLAND, Ore. (KOIN) -- The calendar says it's back to school time. The calendar also says it's still summer.

As the region bakes under a late summer heat wave, teachers and students are getting back into the classrooms beginning Tuesday, though some districts -- like Salem -- don't start until after Labor Day.

A KOIN 6 Weather Alert remains in place through Tuesday night with forecast highs in the 90s under an Extreme Heat Warning.

But Oregon's largest school district, Portland, opens its doors Tuesday, as does Vancouver. Both districts told KOIN 6 News they have plans in place to deal with the heat and will keep an eye on conditions if anything changes.

In Portland, Superintendent Kimberlee Armstrong will greet students at Chapman Elementary, Harriet Tubman Middle School and Jeffers

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