By Bart Biesemans, Caden Kipfmueller and Charlotte Van Campenhout

BOCHOLT, Belgium, June 25 (Reuters) – Belgium issued a rare “red alert” for extreme heat on Thursday amid ‌a days-long heatwave which has raised concerns about milk and meat production ‌as livestock such as cows and pigs struggle with the scorching weather.

Flemish farming association Boerenbond expects the ​heatwave to reduce both milk and meat production, though it is too early to give precise figures, a spokesperson said.

Sander Palmans, 35, director of the Agricultural Research and Education Center and a farmer in Bocholt near the Dutch border, said his cows and ‌pigs were suffering from heat ⁠stress.

While he uses cooling techniques such as fans to help the animals, the temperatures, which are expected to reach up to ⁠40 degrees Celsius (104 degrees Fahrenheit), are taking a toll.

Palmans said his cows were less active, ate less and avoided lying down on the warm bedding, all leading to less milk ​production. ​Pigs were also affected, with growth down by ​about 150 grams per day, ‌cutting meat output.

“The heat costs us between €150 and €200 a day,” or 10 to 15% of Palmans’ income, he said.

The Flemish agriculture ministry said the heatwave across much of Europe was affecting mainly livestock farmers, as recent rainfall meant drought was not yet a major concern for crop producers.

“Despite all the measures farmers are taking … you can ‌still see production declining,” said Mark Wulfrancke, a ​spokesperson for Belgian farmers’ association Algemeen Boerensyndicaat.

In France, ​extreme heat killed hundreds of thousands ​of poultry, while reducing feed intake, increasing water demand and ‌cutting milk output for cattle farmers.

Palmans expects heatwaves ​to become more regular, ​which means more frequent use of artificial cooling systems. He said the inlet temperature for livestock housing might need to be reduced by as much ​as 8 C.

“Today it’s ‌an investment for just a few days a year, but we see ​that hot days are increasing,” he said.

(Reporting by Bart Biesemans, Caden Kipfmueller, ​Charlotte Van Campenhout; Editing by Milla Nissi-Prussak)