Here is the latest Iowa news from The Associated Press at 3:48 a.m. CST

DES MOINES, Iowa (AP) — Federal inspectors have repeatedly ordered a southeast Iowa fur farm to improve the grim living conditions for ferrets, foxes, raccoons and skunks it sells to government laboratories and pet stores. Many of the animals have been forced to live in sweltering heat or maggot-infested filth, sometimes with decomposing carcasses in their cages. So far no charges or enforcement action has been taken against the Ruby Fur Farm.

DES MOINES, Iowa (AP) — MidAmerican Energy plans to spend $1 billion updating more than 700 older wind turbines across Iowa. A MidAmerican Energy official says the turbines will be retrofitted with newer, more efficient components, including longer blades, to extend their lifespans an estimated 20 years. The company says each upgraded turbine will annually net between 19 and 28 percent more energy.

ROCK VALLEY, Iowa (AP) — Authorities have arrested a grandson of an 84-year-old man whose body was found by firefighters in northwest Iowa. The Rock Valley Police Department said in a news release Friday that 19-year-old Santos Rodriguez Jr. is charged with first-degree murder and arson in the slaying of Luis Luevanos. Court records don’t list an attorney for Rodriguez.

WATERLOO, Iowa (AP) — A Waterloo city councilman wants the city to sell advertising space on city vehicles. The Waterloo-Cedar Falls Courier reports that Councilman Ron Welper has been working with city staff and an advertising agency on a plan to sell sign space on police vehicles, firetrucks and garbage trucks. He projects revenue of about $100,000 a year. The council took no action Monday after receiving information about Welper’s proposal.