回答
- Declaration of the state of emergency will apply to the whole nation
- There will be a nation-wide declaration of the state of emergency
Declaration of the state of emergency will apply to the whole nation:"declaration"=「宣言」"state of emergency"＝「緊急事態」"will apply"=「適用する」"to the whole nation"＝「国全体へ」There will be a nation-wide declaration of the state of emergency："nation-wide"「国全体」
回答
- It seems that the declaration of the state of emergency will be extended to the whole country.
- The declaration of the state of emergency is likely to cover all of Japan.
It seems that～＝「～のようだ」Declaration＝「宣言」the state of emergency＝「非常事態」be extended to～＝「～に広がる」the whole country.＝「国全体」cover～＝「～に広がる（及ぶ）」be likely to～＝「～しそうである」It seems that the state of emergency will be extended to the whole country.「非常事態宣言が国中に広がりそうだ」The declaration of the state of emergency is likely to cover all of Japan「非常事態宣言が日本中に広がりそうである」
回答
- The state of emergency will cover all of Japan.
こんにちは。様々な言い方ができると思いますが、例えば次のような英語表現はいかがでしょうか：The state of emergency will cover all of Japan.日本全国が緊急事態宣言の対象になります。cover all of ... は「〜全部が対象になる」というニュアンスの英語表現です。ぜひ参考にしてください。
アメリカ合衆国 
日本 
