Natalie,

You will need to stake or guy the tree back to an upright position. Although the tree will most likely continue to live, unless straightened there will always be a visible lean in the trunk. If the tree was in good condition prior to the wind damage, it should recover well.

I would also recommend straightening the tree sooner rather than later. It can be assumed there was some root damage, resulting from the wind. If you wait more than a week or so, you will inevitably cause more damage to the root system.

Hope that helps.

Thank you Arbormike,

I thought the tree was uprooted at first and checked the roots: they seem to be intact on the surface (unless there is underground damage). Will stake it ASAP. Glad it did not brake and killed the newly planted roses.
This year it is especially covered with peaches. Probably the heaviness of the fruit that is mostly on top pulled it down. We are lucky though - other people in our state had major damages due to a recent tornado.

Thanks again!
Natalie