disaster-stricken area; affected area
Refers to a geographical area that has suffered damage from a natural disaster or other calamity. Often used in news reports and official contexts.
The government sent relief supplies to the disaster-stricken area.
Reconstruction of the affected area will take a long time.
被災地 is a more common and slightly shorter synonym for 'disaster-stricken area'. 被災地域 is a bit more formal and emphasizes the broader region.
被災者 means 'disaster victim' (person), while 被災地域 refers to the area itself.
Compound of 被災 (hisai, 'suffering damage') + 地域 (chiiki, 'area, region').