The National Weather Service continues the heat advisory through Tuesday afternoon. Temperatures once again on Tuesday will rise to the upper 90s however high humidity will make it feel like 105 to 110 degrees.
Authorities say several hundred pigs have been killed by a fire at a feeding operation in northwest Iowa.
The fire was reported around 9:50 p.m. on Saturday at a confinement facility four miles southeast of Rock Valley. Firefighters reported the hog confinement building was fully engulfed in flames when they arrived. About 650 30-pound pigs were killed.
The cause of the fire is being investigated.
Authorities also are investigating the deaths of an estimated 475 hogs at a confinement facility five miles south of Rock Valley. The Sioux County Sheriff's Office says someone entered the building and tampered with the climate control system between 3 p.m. Tuesday and 1 p.m. Wednesday.
The hogs weighed about 280 pounds each.