check your local community and technical colleges. I'd imagine they have one starting up in august at the beginning of the semester. Also check to see if your college has a campus EMS program or something like that. I took mine through a campus program, but the class was run by a cc.
Also, you usually cannot just sign up for EMT classes. You have to apply to the program and they get quite a few apps so it takes some time for them all to be reviewed. Many have a deadline that is almost 2 months before the start of class. Plus you may need to complete a physical and have a background screening. Good Luck!