
überschwemmen
to flood
To cover an area with a large amount of water, for example during high water or a flood.
Nach tagelangem Regen hat der Fluss die angrenzenden Felder überschwemmt.
After days of rain, the river flooded the adjacent fields.
to flood
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to flood
To cover an area with a large amount of water, for example during high water or a flood.
Nach tagelangem Regen hat der Fluss die angrenzenden Felder überschwemmt.
After days of rain, the river flooded the adjacent fields.

to flood
To arrive somewhere or be brought somewhere in excessive quantities. Often refers to goods on a market or to information such as emails or inquiries.
Nach der Werbekampagne wurde unser Posteingang mit Anfragen überschwemmt.
After the advertising campaign, our inbox was flooded with inquiries.
The verb 'überschwemmen' (to flood) is inseparable. The prefix 'über-' stays firmly attached to the verb in all sentence forms.
Das Hochwasser überschwemmte mehrere Dörfer.
The floodwater flooded several villages.
In the figurative meaning, 'überschwemmen' (to flood) is often used with an oversupply of things or information. Typical combinations are 'den Markt überschwemmen' (to flood the market), 'mit Anrufen überschwemmt werden' (to be flooded with calls), or 'das Netz mit Bildern überschwemmen' (to flood the internet with images).
Nach dem Aufruf wurde das Tierheim mit Spenden überschwemmt.
After the appeal, the animal shelter was flooded with donations.
Especially in the figurative meaning, the passive is often used to emphasize who or what is affected by the mass of things. The structure is: Someone/Something is flooded with something.
Ich werde jeden Tag mit unwichtigen E-Mails überschwemmt.
I am flooded with unimportant emails every day.
to flood
Both words can be used when a market or another place receives an excessive quantity of goods or information. Überfluten places greater emphasis on the large quantity and its effect on the recipient; überschwemmen focuses more on the mass flow or influx. Überschwemmen is especially common for markets and large quantities of goods.

Billige Produkte aus dem Ausland überschwemmen inzwischen den kleinen Markt.
Cheap products from abroad are now flooding the small market.
Die vielen neuen Angebote überfluten den kleinen Markt und machen die Auswahl schwierig.
The many new products are flooding the small market and making it difficult to choose.