German Chancellor Angela Merkel and President Frank-Walter Steinmeier.
German news channel NTV reports that Mrs Merkel had a bout of shaking in hot weather on a visit to Mexico in 2017, as she was attending a military honours ceremony.
She was offered a glass of water, but did not drink it.
Addressing questions on whether she would take part in the swearing-in of the new minister and this weekend's G20 meeting in Japan, he said: "Everything is taking place as planned". "The chancellor is fine". She later appeared to blame dehydration, saying she felt better after drinking some water.
Ms Merkel, who has been German leader since 2005, was due to set off for Japan later on Thursday for the annual G20 summit.
The incident took place during a farewell ceremony for outgoing Justice Minister Katarina Barley in Berlin.
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She was later located and arrested at around 10:30 a.m., just eight miles from where the shooting took place, Henkel continued. High-profile Orlando attorney John Morgan posted on his Facebook page that he would represent Courtney Irby for free.
It did not give a date for the other incident, but said it was also ascribed to Merkel not drinking enough water.
German weather agency Deutscher Wetterdienst said Wednesday a preliminary reading showed it reached 101.5 degrees Fahrenheit in Coschen, Germany, near the Polish border.
Standing alongside President Frank-Walter Steinmeier in Schloss Bellevue, the president's official residence, Angela Merkel was filmed holding her arms across her chest, while her legs appeared to be trembling visibly.
The chancellor has a reputation for stamina garnered in years of late-night domestic and European negotiating marathons. During that period there was no sign then of any health issues, according to the Associated Press.
Earlier that same year, she had fractured her pelvis while cross-country skiing in Switzerland and was ordered to cut back her schedule dramatically and stay in bed as much as possible for three weeks.
She is Germany's third-longest serving post-war chancellor.