Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE region ( region_id number, region_code text, region_name text )
TABLE: CREATE TABLE affected_region ( region_id number, storm_id number, number_city_affected number )
TABLE: CREATE TABLE storm ( storm_id number, name text, dates_active text, max_speed number, damage_millions_usd number, number_deaths number )

### Question ###
What are the names of storms that did not affect two or more regions?

### Accurate SQL ###

SELECT name FROM storm EXCEPT SELECT T1.name FROM storm AS T1 JOIN affected_region AS T2 ON T1.storm_id = T2.storm_id GROUP BY T1.storm_id HAVING COUNT(*) >= 2