By Friday morning, Seattle will have a 90% chance of rain, the weather service said, and the probability of rainfall rises to 100% by Friday night. The Seattle area could see up to 1.25 inches of rain on Friday alone, according to the forecast. Chances of rain drop to 70% on Saturday, when less than a 10th of an inch of rain is expected to fall.

Winds could blow smoke from the Bear Gulch fire burning on the Olympic Peninsula, bringing the potential for unhealthy air and hazy skies.

While relief from the heat in the form of cool, Pacific breezes are on the way to Western Washington, the near-record hot temperatures on Tuesday has allowed two major fires in the Northwest to erupt with flames and smoke during the day.