It's common for carriers to stop writing insurance in places, but apart from Florida I haven't seen large carriers like State Farm pull out of entire states in this way.
The Gulf South has been having a tough time with a string of catastrophic storms and flooding. Since 2005, Louisiana has been struck by 10 hurricanes. Flood policies have become so incredibly expensive that some people are simply saving money and throwing it into an account because it makes more sense than paying $8K+ to get a home insured for a year.
The state passed a law that was basically, pay 0.8% tax for the rest of your life or buy private LTC care for 30 days and avoid paying the tax forever.
The insurance providers were not happy to see people joining for 1 mo and then canceling.