The calendar may say it’s autumn, but summer apparently is not quite ready to fade off into the sunset in Santa Barbara County.

Forecasters have issued a Red Flag Warning for “critical fire weather” danger for the county’s South Coast and mountain areas, effective from 6 p.m Wednesday until 9 a.m. Thursdauy.

A Heat Advisory for the South Coast that will be in effect from 11 a.m. Wednesday until 8 p.m. Friday.

Daytime high temperatures could reach triple digits during the period, according to the National Weather Service in Oxnard.

The high at the Santa Barbara Airport — the area’s official forecast station — is expected to be 85 on Wednesday and 87 on Thursday.

However, highs in the 90s are expected in downtown Santa Barbara and Goleta before things begin cooling over the weekend.

As of 9 p.m. Wednesday, temperatures had jumped into the 90s in Santa Barbara, Montecito and several foothills locations, accompanied by some gusty sundowner winds.

Inland areas also will be hot, with Santa Ynez expected to reach 103 on Wednesday, 105 on Thursday and 101 on Friday.

The Santa Maria and Lompoc valleys will see highs in the upper-80s and low-90s.

Forecasters warn that the toasty conditions can lead to heat-related illnesses, and urge people to “drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.”

Clear skies are expected through the week, with overnight lows around 60 along the coast and in the low-50s inland.

Winds of 10-15 mph, with gusts to 40 mph in some foothill and moutain areas, are expected Wednesday night.

Click here for the latest forecast from the National Weather Service.

— Noozhawk executive editor Tom Bolton can be reached at tbolton@noozhawk.com. Follow Noozhawk on Twitter: @noozhawk, @NoozhawkNews and @NoozhawkBiz. Connect with Noozhawk on Facebook.