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Hazy skies over Colorado: Where is the smoke coming from?

Unusually sensitive people in Colorado should consider reducing prolonged or heavy exertion on Wednesday.

DENVER — Smoke from wildfires in the northwestern United States has arrived in Colorado.

The heaviest smoke impacts on Wednesday will be in the northwestern and west-central parts of Colorado. Valley locations in Colorado will be particularly vulnerable Wednesday, according to the Colorado Department of Public Health and Environment (CDPHE).

Denver set a new record high temperature Tuesday and could break the daily record on Wednesday and Thursday.

A Heat Advisory and Fire Weather Watch have been issued Wednesday for parts of Colorado. The northwestern section of Colorado, including the Denver metro area, is under an Air Quality Alert due to ozone Wednesday.

Unusually sensitive people in Colorado should consider reducing prolonged or heavy exertion on Wednesday, said CDPHE.

Credit: 9NEWS

Very hot and dry conditions will be seen across much of the West over the next few days including widespread temperatures over 100 degrees.

There are 69 active wildfires burning in eight states with more than 13,000 wildland fire personnel assigned to the fires, according to the National Interagency Fire Center. There are 27 active wildfires in Idaho, 15 in Montana, nine in Oregon and seven wildfires in both California and Washington.

The majority of the smoke coming to Colorado is from Idaho and Montana, said the National Weather Service (NWS) in Boulder.

RELATED: Heat Advisory, Air Quality Alert in effect for Denver metro area

The National Weather Service (NWS) has issued Excessive Heat Warnings and Heat Advisories for much of California and Nevada, as well as parts of Oregon, Idaho, Montana, Utah, and Arizona.

A fuels and fire behavior advisory has been issued for northern California due to dry fuels and the potential for extreme fire behavior with the hot, dry and windy weather pattern.

Some relief is coming for Colorado with two cold fronts on the way. The first front will cool Denver down to around 80 degrees on Friday and the second one will lower the high temperature into the mid 60s by Saturday. A chance for showers and storms also comes along with this next system. 

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