andauern
to last
To continue, persist, or extend over a certain period of time.
Die Bauarbeiten werden voraussichtlich noch mehrere Wochen andauern.
The construction work is expected to last for several more weeks.

to last
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to last
To continue, persist, or extend over a certain period of time.
Die Bauarbeiten werden voraussichtlich noch mehrere Wochen andauern.
The construction work is expected to last for several more weeks.

'Andauern' (to last) is a separable verb. The prefix 'an-' comes at the end in a main clause. In subordinate clauses, the verb stays together.
Der Applaus dauerte mehrere Minuten an.
The applause lasted for several minutes.
This verb is almost always used for impersonal states or events. The subject is typically something abstract like 'die Kälte' (the cold), 'die Probleme' (the problems), 'die Stille' (the silence), or 'die Verhandlungen' (the negotiations).
Die andauernde Trockenheit schadet den Pflanzen.
The ongoing drought is harming the plants.
'Andauern' (to last) belongs more to written language or more formal usage. It is often found in news reports, reports, or official announcements.
Die Störung im Bahnverkehr wird voraussichtlich bis zum Abend andauern.
The disruption to rail traffic is expected to last until the evening.
to run
'laufen' and 'andauern' can both express that something is not over yet. 'laufen' is often used with contracts, deadlines, promotions, or appointments, and then means: something is still valid or still running. 'andauern' describes more generally that a state or event continues over a certain period of time. It often sounds somewhat more formal and is frequently used with problems, rain, conversations, or waiting times. 'Der Vertrag läuft noch' (the contract is still running / still valid) is more natural than 'der Vertrag dauert an'. 'Der Regen dauert an' (the rain continues) fits better than 'der Regen läuft'.

Weil der starke Regen andauert, bleiben viele Leute zu Hause.
Because the heavy rain is continuing, many people are staying home.
Der Mietvertrag läuft noch bis Ende Dezember.
The rental contract runs until the end of December.