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_name VARCHAR, region_id VARCHAR )
TABLE: CREATE TABLE affected_region ( region_id VARCHAR )

### Question ###
Show the region name with at least two storms.

### Accurate SQL ###

SELECT T1.region_name FROM region AS T1 JOIN affected_region AS T2 ON T1.region_id = T2.region_id GROUP BY T1.region_id HAVING COUNT(*) >= 2