EUGENE, Ore. - Roseburg could hit 100 F on Thursday as the region weathers the longest and warmest period so far this year.
Forecasters in Medford issued a Heat Advisory for Roseburg, Sutherlin and Canyonville in central Douglas County. The advisory extends into parts of southern Lane County.
The Advisory starts Thursday at 2 p.m. and continues through 11 p.m. Monday. Forecast highs of 95 to 100 are possible daily, with lows down to 60.
"Very high temperatures and limited relief overnight will increase chances for heat related illness, especially for sensitive groups and people without access to air conditioning," forecasters cautioned. "Heat stress is also possible for livestock and outdoor pets."
Farther south, Grants Pass, Medford and Ashland face an Excessive Heat Warning, in effect through Tuesday night.
"An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur," forecasters said. "The combination of hot temperatures and high humidity will combine to create a DANGEROUS SITUATION in which heat illnesses are likely. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors."
Temperatures there are forecast to top out at 102 to 107 F, with lows in the mid-60s to mid-70s.
"Take extra precautions, if you work or spend time outside," forecasters cautioned. "When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear light weight and loose fitting clothing when possible and drink plenty of water."
The Eugene-Springfield area is forecast to be in the 90s through the weekend, with lows in the 50s.
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Thursday and Sunday are forecast to be the warmest days, with forecast highs of 96 and 95. Friday and Saturday have forecast highs of 91 F.