You need a passport to travel outside of your country and back home. However, what happens when your passport is damaged when you get caught in a rain storm? What happens if your passport goes through the laundry? These events are common and do not present an unfixalbe problem.
The technical answer to this question is no. Nonetheless, countries and customs agents handle these problems on an individual basis. The risk of being inconvenienced by a denied passport is great, however. Replace your damaged passport as soon as possible. Even though the passport may still be readable and can be scanned, airlines and customs agents reserve the right to refuse to accept a damaged passport.
Check the website of your country's State Department or similar office. Most will provide detailed information on getting a new passport. If you are a United States citizen who is still within the United States, you can visit the State Department website to learn how you can get a new passport. However, you cannot renew your damaged passport; you must follow the procedures for applying for a new passport.
If you are abroad and your passport is damaged, go immediately to your country's embassy or consulate. If those offices are not available, you should go to an allied country's embassy or consulate. In some cities, you may be able to receive assistance at the airport.