The soldiers guarding the Royal Palace in Oslo are also feeling the summer heat. They were served water Thursday evening, yet on the whole it’s business as usual for them.

The Royal Guard stands outside the Royal Palace all day, every day. Each guard’s shift normally lasts two hours, but this can be adjusted during periods of extreme weather.

—“On particularly hot or cold days, the Commander of the Guard can reduce the length of the shift to just one hour, or however long is reasonable,” says Lars Strøm to the Norwegian News Agency. He is head of communications in the Armed Forces.

With an outside temperature of 30°C (86°F) in Oslo on Thursday, which is felt closer to 40°C (104°F) under the Royal Guard’s thick wool uniforms, even the soldiers need to replenish their fluids. The Norwegian News Agency got to witness Thursday evening the soldiers of the Royal Guard serving each other water while on duty.

—“Even our best soldiers absolutely must drink water to be able to carry out their duties. Remember to drink water and enjoy your summer!” Strøm says.

The Royal Guard wears the same wool uniform year-round, but the clothes worn under the uniform vary by season.

—“In the wintertime the soldiers of the Royal Guard will often wear several layers of wool under the uniform. In the summertime they just wear t-shirts,” Strøm says.