SELECT T2.region_name FROM affected_region AS T1 JOIN region AS T2 ON T1.region_id  =  T2.region_id JOIN storm AS T3 ON T1.storm_id  =  T3.storm_id WHERE T3.number_deaths  >=  10
Return the names of the regions affected by storms that had a death count of at least 10.
[Schema (values) (types)]: | storm_record |  storm : storm_id (text) , name (number) , dates_active (text) , max_speed (text) , damage_millions_usd (number) , number_deaths (number) | region : region_id (text) , region_code (number) , region_name (text) | affected_region : region_id (text) , storm_id (number) , number_city_affected (text);