ˈɔːfeɪz kæn pɹɪzˈɛnt ɐn ɛkstɹˈiːm dˈeɪndʒɚ tə ɹˌɛkɹiːˈeɪʃənəl bˈoʊɾɚz ˈiːvən dˈʊɹɹɪŋ sˈʌmɚ mˈʌnθs, hˌuː kæn fˈaɪnd ðɛmsˈɛlvz tɹˈæpt bᵻtwˌiːn wˈɔːlz ʌv ˈaɪs ɔːɹ pˈʊld ˌʌndɚɹ ˈɔːfeɪz baɪ ðə kˈɜːɹənt ʌvðə ɹˈɪvɚ.
Aufeis can present an extreme danger to recreational boaters even during summer months, who can find themselves trapped between walls of ice or pulled under aufeis by the current of the river.