The Miracles of Imam Hasan and Imam Hussain (May Allah be well pleased with them)

 The sky became red

There is a Tradition in Mo’jam Kabeer Tabarani and in Majma Uz Zawaaid:

Translation:  Hadhrat Abu Bakr bin ‘Ayyash narrates on the authority of Hadhrat Jameel bin Zaid, he says:  When Imam Hussain (May Allah be well pleased with him) was martyred, the sky became red.  I said:  What do you say?  Hadhrat Jameel bin Zaid said:  Indeed, the one who lies is a hypocrite.  Verily, at the time of his martyrdom, the sky became red.  (Mo’jam Kabeer Tabarani, Hadith No. 2768; Majma Uz Zawaaid, Hadith No. 15162)