It is illegal to even possess fireworks inside the Abilene city limits, much less set them off; this applies to most towns and cities across the state, also.
As far as outside the city limits, fireworks can only be ignited on private property, with the landowner's permission, and only if the county's commissioners haven't banned fireworks due to drought reasons. Fireworks can not be set off along public rights of way, including county roads and state/federal highways.
Most people don't realize that Lake Fort Phantom is entirely inside the Abilene city limits, so even the possession of fireworks is illegal at the lake. The same goes for Kirby Lake in far south Abilene.
The Abilene police and fire departments will issue citations to citizens who set off fireworks within the city limits, and will confiscate any and all fireworks.
Below is an infographic from CPSC.gov illustrating the most common fireworks injuries and tips on how to keep you, your family and your friends safe on the 4th: