Tuesday is officially the hottest October day ever recorded in Cincinnati.

The National Weather Service said high temperatures in Cincinnati and Columbus may shatter records by 2 to 3+ degrees. The records date back more than 135 years.

Tuesday's high in Cincinnati is expected to hit 94. But it had already beat the record of 91 by 1:45 p.m.

The previous monthly record high of 91 was set in 2007 and 1941.

"Well – we don't say this often – but (Tuesday) may be the hottest October day in recorded history in the local area. We are forecasting record high temps today w/ more of the same again Wednesday," the National Weather Service said.

A hazardous weather outlook has been issued for Greater Cincinnati due to the unseasonable heat. On Tuesday and Wednesday afternoon, heat indices could reach the mid- to upper 90s.

For early October, these temperatures are 25-30 degrees above normal.

"Persons sensitive to heat should limit time spent outdoors today. Frequent breaks in the shade and plenty of water for those who must be out during the hottest part of the day," the National Weather Service said.

Greater Cincinnati will get a break in the heat toward the end of the week.

"A cold front will bring much cooler temperatures back to the region by Friday into the upcoming weekend. A chance of rain may return toward the end of the upcoming weekend," the National Weather Service said.

Highs on Saturday and Sunday are expected to be in the mid-70s.

More:The story of the hottest day in Cincinnati history

The record-breaking results are in for September:

September saw 20 consecutive dry days, the most since June 1994.

There were only two days of measurable precipitation, making it the second driest September recorded in Cincinnati.

The monthly average temp of 75.4 broke a record last set in 1881, making it the second hottest Cincinnati September.

This year also saw the longest stretch of days above 85 degrees (22 days) since recording began in 1871.

Here's what to expect:

Tuesday: Sunny, with a high near 94. Overnight low around 72.

Wednesday: Sunny, with a high near 95. Overnight low around 70.

Thursday: Mostly sunny, with a high near 88. Overnight low around 54.

Friday: Sunny, with a high near 69. Overnight low around 49.

Saturday: Sunny, with a high near 74. Overnight low around 58.

Sunday: A chance of showers. Mostly cloudy, with a high near 76. Overnight chance of showers, with a low around 55.

Monday: A chance of showers. Mostly cloudy, with a high near 70.

Forecast provided by the National Weather Service at Wilmington.