It's smoky in Sioux Falls for the second day in a row. Here's what to expect Friday.

The smoke-filled skies were supposed to subside on Thursday, but the haze has stuck around for a second day Friday.

Large wildfires near Lake Winnipeg in Canada are the cause of the hazy skies in Sioux Falls. They've been sending smoke southbound and while the smoke was supposed to roll through the Sioux Falls area throughout Thursday, residents woke up Friday morning to another hazy sky.

Due to the fairly light winds across the area, the smoke that came down from Manitoba Thursday will remain in place throughout Friday. Rainfall Friday morning into the afternoon hours will likely scour out the smoke, but those sensitive to smoke should take precautions, the National Weather Service (NWS) in Sioux Falls said.

What you should do to limit exposure in unhealthy air quality 

Along with reduced visibility and an odor, the wildfire in the air makes for a drop in air quality, according to the NWS.

People with heart or lung disease, older adults, children and teens can take any of these steps to reduce exposure, according to AirNow.gov:

• Avoid strenuous outdoor activities.
• Keep outdoor activities short.
• Consider moving physical activities indoors or rescheduling them.

Everyone else can take any of these steps to reduce exposure, according to AirNow.gov:

• Choose less strenuous activities, like walking instead of running, so you don’t breathe as hard.
• Shorten the amount of time you are active outdoors.
• Be active outdoors when the air quality is better.

Thursday's alert:Air quality alert issued for eastern South Dakota due to smoke from Canadian wildfires

Sioux Falls Air Quality Index

Sioux Falls usually has an Air Quality Index rating in the 40s to 60s, but on Thursday it had an AQI of 126 and as of 9 a.m. Friday morning had a rating of 178. Both recent ratings are classified as unhealthy, according to AirNow.gov.

Sioux Falls and eastern South Dakota are under an Air Quality Alert due to the smoke. The AQI was classified as very unhealthy in Sioux Falls. Around 7 a.m. Friday an AQI of 209 was recorded in the area, according to the South Dakota Department of Agriculture and Natural Resources.

Due to the bad air quality, Wild Water West Waterpark announced on Facebook that the bussiness would be closed Friday.