《资治通鉴·隋纪·隋纪五》
山东、河南发大水，淹没三十余郡。
山东、河南大水，漂没三十馀郡。
Shandong and Henan were flooded, submerging more than 30 counties.
<s>[INST] Kindly elucidate the central themes in this passage in English: 山东、河南大水，漂没三十馀郡。 [/INST] Shandong and Henan were flooded, submerging more than 30 counties.</s>
Kindly elucidate the central themes in this passage in English: 山东、河南大水，漂没三十馀郡。
user
Shandong and Henan were flooded, submerging more than 30 counties.
assistant