DETROIT (AP) — Concerns about the spreading coronavirus forced most of North America's auto plants to close, at least temporarily.

Ford, General Motors, Fiat Chrysler, Honda and Toyota said they would shut down all of their factories in the region, citing concerns for employees who work in close quarters building automobiles. In addition, Hyundai closed its Alabama plant after a worker tested positive for the virus.

Detroit's three automakers said their closures would begin this week, while Honda and Toyota will start next week. Closings will run from a few days to almost two weeks, but most automakers said they'll have to evaluate the spread of the virus before reopening.

"We have been taking extraordinary precautions around the world to keep our plant environments safe, and recent developments in North America make it clear this is the right thing to do now," GM CEO Mary Barra said in a statement.

Detroit's three automakers alone will idle about 150,000 workers. They likely will receive supplemental pay in addition to state unemployment benefits. The two checks combined will about equal what the workers normally make. GM said pay was still being negotiated with the United Auto Workers union.

Ford said it will work with union leaders in the coming weeks on plans to restart factories. The union has been pushing for factories to close because workers are fearful of coming into contact with the virus.

At GM's pickup truck assembly plant in Flint, Michigan, workers have been apprehensive ever since the virus surfaced in the U.S., said Tommy Wolikow, a union member who delivers parts to the assembly line.

Wolikow, 38, said he comes in close contact with other workers and was afraid of catching the virus and passing it to his two daughters ages 2 and 7.

"That's the thing that I was scared the most about, being the one to bring it home to them," he said.

He is happy that GM is closing and is hopeful that he'll get unemployment and supplemental pay.

Honda announced plans Wednesday morning to close for a week starting Monday, putting additional pressure on Detroit's automakers to follow suit. Toyota plants will close Monday and Tuesday, reopening Wednesday after a thorough cleaning, the company said.

In addition, Hyundai suspended production at its plant in Montgomery, Alabama, plant Wednesday after a worker tested positive for the coronavirus. The company said production would resume once its health and safety team determines that the plant has been sufficiently sanitized.

The decision by Ford, General Motors and Fiat Chrysler reverses a deal worked out late Tuesday in which the three agreed to cancel some shifts so they could thoroughly cleanse equipment and buildings, but keep factories open. But workers, especially at some Fiat Chrysler factories, were still fearful and were pressuring the union to seek full closures.

Before the closings were announced, Fiat Chrysler sent workers home from a factory in Sterling Heights, Michigan, north of Detroit, after workers were concerned about the virus. The company said a plant worker tested positive for the coronavirus but had not been to work in over a week.

Ford said it closed an assembly plant in the Detroit suburb of Wayne, Michigan, on Wednesday after a worker there tested positive for the virus that causes COVID-19. The company said it is thoroughly cleaning and disinfecting the building. Production will be halted through March 30, the company said.

Automakers have resisted closing factories largely because they book revenue when vehicles are shipped from factories to dealerships. So without production, revenue dries up. Each company has other reasons to stay open as well. Ford, for instance, is building up F-150 pickup inventory because its plants will have to go out of service later this year to be retooled for an all-new model.

Despite the plant closures by other automakers, electric vehicle maker Tesla Inc.'s assembly plant in Fremont, California, remained open Wednesday. Production continued even though Alameda County on Tuesday night declared it a "nonessential business" under the county's shelter-in-place order.

Seven Bay Area counties have ordered nearly 7 million residents to shelter in place for three weeks and ordered businesses to send employees home in order to slow spread of the coronavirus. Businesses that can remain open include pharmacies, banks and supermarkets — but not electric car manufacturing.

In an email to employees, Tesla Human Resources said the company does not have final word from city, county, state and federal governments on whether the plant can operate. Tesla has conflicting guidance from different levels of government, the email said.

The note said production workers should still report for work unless they aren't feeling well. If that's the case, they should use paid time off. The email said there would be further communication Wednesday night.