As with the Prophet Ibrahim (as), Imam Mahdi (as) will also EMERGE SAFELY FROM THE BURNING FLAMES. 

Mikyaal al-Makaarem, Vol. 1, p. 181


As part of the test to which sincere Muslims are subjected to in this world, all prophets have been exposed to pressure, difficulties and sufferings from deniers in order to bear witness to their love of and loyalty to Allah and the profundity of their faith. When we look at the lives of the prophets Nuh (as), Musa (as), Yusuf (as), our Prophet (saas) and the other prophets, we see that on Allah’s path they have been exposed to snares, slanders, false accusations and death threats and threatened with exile by deniers. This is the secret of the test created by Allah in order to distinguish sincere Muslims who believe in Him unreservedly and place their trust in Him, from dishonest people of weak faith and hypocritical natures and who harbor sickness in their hearts.

In accordance with the verses, “For truly with hardship comes ease; truly with hardship comes ease” (Surat al-Inshirah, 5-6), Allah always makes things easy for people who have a great love for Him and who live for His approval alone, and makes His mercy, love and protection felt at all times by helping them in their difficulties.
 
For example, the Prophet Ibrahim (as) wished to save the society he lived in from its heretical beliefs, and was exposed to severe pressure from the tribe for calling on them to adopt the religion of Allah and proper moral values. Indeed, the hostility of the community reached such a level that they elected to cast the Prophet Ibrahim (as) into the flames and burn him. But Allah saved him from this ruthless snare by commanding the fire to “be peaceful and cool for Ibrahim!” (Surat al-Anbiya’, 69)
 
By saying “As with the Prophet Ibrahim (as), Imam Mahdi (as) will also EMERGE SAFELY FROM THE BURNING FLAMES” in this hadith, our Prophet (saas) compares Hazrat Mahdi (as) to the Prophet Ibrahim (as) as someone who will, WITH ALLAH’S HELP, EMERGE SAFELY FROM THE MOST DANGEROUS SNARES, THE WORST ACCUSATIONS, SLANDERS AND EVILS.