In the midst of the power outages, Venezuelans have taken to the streets in protest, fuelled by the anger and frustration of living in the dark.
Guaido called for mass demonstration and international cooperation as the opposition-led congress called for a symbolic "state of alarm", Al-jazeera reported.
Leaders of the opposition have been holding anti-Maduro rallies across the country.
The USA, which is backing Guaido, as the rightful president of the country, ordered its diplomats to leave Venezuela due to the unstable conditions. US special envoy Elliott Abrams said the US might impose "very significant" Venezuela-related sanctions against financial institutions, Reuters reported.
CNN reported that on Monday, the USA imposed sanction on a Russian Bank, Evrofinance Mosnarbank, which has ties to Venezuela's PDVSA, the country's state-owned oil company.
In January, the USA imposed sanctions against PDVSA in an attempt to cut off a vital source of funding for Maduro's government, according to AFP.