A combination of wind, heat and low humidity all contribute to dangerous fire weather.
Oconto County decided to revoke burning permits Monday, meaning civilians can't do controlled burns.
While state law allows for small bonfires during high fire danger times, firefighters say it may be a bad idea.
"Fire weather is pretty high. You know, the chances of that fire escaping and causing a wildfire and possibly burning something down or hurting somebody, there's a much greater chance, so I'd recommend against it, especially on days like today when we have burning permits cancelled," said Chris Duncan, DNR Forester Ranger.
Duncan says people should also be very careful when using machinery that could cause sparks.
Duncan also recommends checking with local fire authorities before burns to make sure you're following the rules and to make sure everyone stays safe.