וְנָֽתַתִּי֙ מֽוֹפְתִ֔ים בַּשָּׁמַ֖יִם וּבָאָ֑רֶץ דָּ֣ם וָאֵ֔שׁ וְתִֽימֲר֖וֹת עָשָֽׁן׃
And I will shew wonders in the heavens and in the earth, Blood, and fire, and pillars of smoke.
Read kabbalistic (mystical) interpretation of Joel 3:3: and classical mystical sources.