Ночью они проснулись и увидели, что

Ночью они проснулись и увидели, что их палатку заливает вода. Они попытались спасти свои вещи, но это им не удалось.

Results (English) 1:

At night they woke up and saw their tent fills with water. They tried to save their belongings, but they failed.

Results (English) 2:

At night, they woke up and saw that their tent is filled with water. They tried to save their belongings, but they did not succeed.

Results (English) 3:

At night, they woke up and saw that their tent sluices water. They tried to save their belongings, but that they have not been able.