to alert
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to alert
To call for help in an emergency or dangerous situation by notifying a responsible organization such as the police, fire department, or emergency medical service.
Als sie den Rauch bemerkte, alarmierte sie sofort die Feuerwehr.
When she noticed the smoke, she immediately alerted the fire department.
to alarm
To make someone very worried or concerned.
Die Nachricht vom plötzlichen Kursverfall alarmierte die Anleger.
The news of the sudden drop in prices alarmed the investors.
The verb 'alarmieren' (to alert/alarm) derives directly from the noun 'der Alarm' (the alarm). The ending '-ieren' is a typical way of forming verbs from nouns, often loanwords.
Bei einem Feueralarm müssen alle das Gebäude verlassen.
In the event of a fire alarm, everyone must leave the building.
You can recognize the meaning from the object: if you alarmieren (alert) an organization like the police or fire department, you are calling for help. If a piece of news or development alarmiert (alarms) a person, that person becomes worried.
Ein Zeuge alarmierte die Polizei.
A witness alerted the police.
When it is about calling for help, 'alarmieren' (to alert) is typically used with emergency services: 'die Feuerwehr alarmieren' (to alert the fire department), 'die Polizei alarmieren' (to alert the police), 'den Notarzt alarmieren' (to alert the emergency doctor).
Wegen des medizinischen Notfalls musste der Pilot den Rettungsdienst alarmieren.
Because of the medical emergency, the pilot had to alert the emergency services.
In the meaning 'beunruhigen' (to worry/alarm), the subject is often something abstract, such as a piece of news, a report, or a development. The person who is worried is in the accusative.
Der Bericht über den Klimawandel hat viele Menschen alarmiert.
The report on climate change alarmed many people.
to warn
Both warnen and alarmieren can be reactions to a danger. Someone who warnt draws others' attention to the danger so that they can protect themselves. Someone who alarmiert notifies the responsible authority in an emergency and thereby calls for help.
Als sie Flammen sah, alarmierte sie sofort die Feuerwehr.
When she saw flames, she immediately alerted the fire department.
Als sie Rauch bemerkte, warnte sie sofort die Nachbarn vor dem Feuer.
When she noticed smoke, she immediately warned the neighbors about the fire.
