https://mashable.com/article/french-off ... dame-fire/
President Trump expressed his condolences on Twitter and suggested using "flying water tankers" to dampen the fire.
Two hours later, the French civil security and crisis management account politely subtweeted Trump. Note that this particular tweet is in English while the account's previous tweets are in French.
"All means are being used, except for water-bombing aircrafts," the agency tweeted, explaining that if the Paris Fire Brigade were to use Trump's suggestion, what's left of the cathedral could collapse entirely.