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BOISE -- On Sunday, firefighters in southwest Idaho were working on at least three grass fires that are believed to be human-caused.

On Sunday morning, the Bureau of Land Management said a human-caused fire scorched around 75 acres north of Middleton. It kept crews around for hours working to contain the fire and then put out any flare-ups.

It is really hot today, said Mallory Eils with the Boise District BLM. I think it's supposed to be close to 100 today, and so that heat will play a little bit of a factor in keeping things warm on the fire, so our fire crews will be looking out for that for sure.

BLM didn't give an exact cause for the fire, but have had investigators, including an arson dog, checking the area.

In the afternoon, a nearly 250 acre fire started along Highway 21 near the High Bridge. Trying to protect the rangeland, the Boise National Forest took to the steep hills and the skies. Forest officials said the Sheriff's Office believes the fire was human-caused, perhaps by a vehicle driving by.

This time of year is getting hotter and drier so it's really important that everybody out on the roads and recreating do everything they can to prevent wildfire, said Guy Pence with the Boise National Forest. It's very costly and very hazardous.

Later in the evening, a small grass fire started just north of Eagle Road on Willow Creek. Firefighters said they could see thick black smoke from four miles away. Seeing that, they immediately called for extra help.

With these hot temperatures, and the potential for thunderstorms coming in, we're taking these incidents very seriously, said Eagle Fire Department Captain Rob Shoplock. We are sending quite a bit of resources, making sure that we get to the fire before we have any loss of homes and things like that.

The fire did get within 20 feet of a home, but firefighters were able to stop it.

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