Hottest temperatures so far this year about to hit the Tri-Cities region

The Tri-Cities should get a preview of summer in the coming days.

The temperature is forecast to climb to 90 degrees on Saturday. That’s about 15 degrees higher than normal for the date.

And it could even be a few degrees warmer. The National Weather Service says the chances of temperatures warmer than 90 is 66% for the Tri-Cities.

The hottest temperature so far this year was 83 degrees on April 14. May had yet to have the temperature reach the 80s, according to weather service data.

The warmer weather is courtesy of an upper level ridge forecast to stay over the Mid-Columbia for the remainder of the week.

The sky should be sunny from Thursday through at least Tuesday. But the temperature should start to drop some after Saturday, with highs falling to the high 70s by Tuesday.

With a high in the 90s Saturday, the temptation may be to test out the water in the Columbia River for the first time this year.

But the weather service warns that rivers will still be very cold and could be swift, as snow melt fills them.

Body heat is lost 25 times faster in cold water than in cold air, and hypothermia can start shortly after being in the water, especially for children.

If exposed to cold waters, even experienced swimmers can lose muscle control quickly, and fast moving water makes rescue more difficult, says the weather service.

“Cold shock” can cause dramatic changes in breathing, heart rate and blood pressure, leading to rapid breathing that increases the risk of drowning, it says.