Preheat your oven to 200 degrees Fahrenheit. This is the temperature that will warm the records for a period of time without completely melting them. Wait 10 minutes for the oven to be adequately preheated.
Place the warped record in between two sheets of glass. This will apply a certain amount of pressure to the album without breaking it.
Put on oven mitts and stick the record and sheets of glass into the preheated oven. Be careful not to burn yourself. Place the record on the middle rack.
Keep an eye on the record. The glass will allow you to see it flattening. The entire process should only take a few minutes. Make sure not to let the record get too hot, or it will melt and be forever ruined.
Remove the record and glass from the oven using oven mitts. Gently place the record and glass on a table to cool. Don't move it until it is completely cool. After 5-10 minutes it should be cooled off, flattened, and ready to be played.