Thailand’s worst floods in half a century have hit Honda the hardest among Japanese automakers, with its 240,000-cars-a-year plant and about 35 of its tier-one suppliers under water.

A spokesman for Japan’s third-biggest automaker said the company had started to cut output in Brazil this week following a reduction at its factory in Britain from Oct. 31.

The floods inundated hundreds of parts suppliers, forcing many automakers to halt work in the country and reduce output elsewhere.

Japanese automakers, which dominate the southeast Asian market, were hit just as they were beginning to work extra hours and days to make up for massive production losses after the March 11 earthquake and tsunami in Japan.

Honda’s production in North America would be affected for several more weeks, the company said earlier.

It had previously announced that production at several Asian factories, including Japan from this week, would also be lowered.

Honda has not disclosed how much production has been cut. Both Toyota and Honda have withdrawn their profit forecasts for the year to March, citing uncertainty about production.

Toyota President Akio Toyoda said his company was still examining the right timing for a full resumption of production in Thailand, after a decision a day earlier to restart partial operations at its three factories in the country on Nov. 21.

Toyota also said on Thursday it would continue production at reduced levels in Asian countries excluding Thailand and in Sough Africa next week.

Japan’s biggest automaker said its North American plants would bring back planned overtime, which had been postponed because of the floods, from Nov. 14, and its Indiana and Canadian factories will operate on Saturday, Nov. 19, as originally scheduled.

Thailand’s disasters have hit automakers in varying degrees.

Nissan Motor, Japan’s No.2 vehicle maker, has said lost output would amount to 60,000 vehicles at most, with a partial restart planned in Thailand from Nov. 14. 

A Thai joint venture between Mazda Motor and Ford Motor, as well as Mitsubishi Motors Corp’s local factory, are also set to resume work next week.

Shares of Japanese automakers fell in a broad decline in Tokyo on Thursday. Toyota, Honda and Nissan lost 1.7 percent, 3.2 percent and 3.6 percent respectively. The Topix index shed 2.6 percent.