Heat dome intensifies Wednesday, Portland area prepares for excessive heat

PORTLAND, Ore. (KOIN) -- A dangerous heat dome will start warming Portland area temperatures Wednesday as record-breaking conditions approach.

Afternoon highs Wednesday will remain seasonal with temperatures rising into the low- to mid- 80s. These July-like temperatures will start Portland's warming trend this week. Temperatures are expected to surpass 100 degrees by the weekend.

The multi-day event will likely keep Portland above 100 for nearly three days. This could potentially cause life-threatening heat-related illness to some exposed to the elements. Staying hydrated, taking breaks indoors and wearing light colored loose-fitting clothing to reduce the threat of heat is a must.

A KOIN 6 Weather Alert will go into place on the Fourth of July and last through the start of next week. That's where temperatures will remain dangerously hot.

The excessive heat will start to fade by the middle to end of next week. Conditions also remain dry around the PNW for the first few weeks of July.

Stay with KOIN 6 Weather for all the latest details.