US President Donald Trump mentioned the earthquake in a tweet, saying: "God bless the people of Mexico City. We are with you and will be there for you." NIGHT SEARCHESResidents of Mexico City, a metropolitan region of some 20 million people, slept in the streets while authorities and volunteers set up tented collection centers to distribute food and water.Volunteers, soldiers and firefighters formed human chains and dug with hammers and picks to find dust-covered survivors and dead bodies in the remains of apartment buildings, schools and a factory.The middle-class neighborhood of Del Valle was hit hard, with several buildings toppling over on just one street. Reserve rescue workers arrived late at night and were still pulling survivors out in the small hours of Wednesday.With power out in much of the city, the work was carried out in the dark or with flashlights and generators. Rescue workers requested silence as they listened for signs of life.Some soldiers were armed with automatic weapons. Authorities said schools would be shut on Wednesday as damage was assessed.Emergency personnel and equipment were being deployed across affected areas so that "throughout the night we can continue aiding the population and eventually find people beneath the rubble," Peña Nieto said in a video posted on Facebook earlier on Tuesday evening.In Obrera, central Mexico City, people applauded when rescuers managed to retrieve four people alive, with cheers of "si se puede" -- "yes we can" -- ringing out.Volunteers continued arriving throughout the night, following calls from the civil protection agency, the Red Cross and firefighters.The quake had killed 86 people in the capital by early Wednesday morning, according to Civil Protection chief Luis Felipe Puente -- fewer than he had previously estimated. In Morelos State, just to the south, 71 people were killed, with hundreds of homes destroyed. In Puebla at least 43 died.Another 17 people were reported killed in the states of Mexico, Guerrero and Oaxaca.As many as 4.6 million homes, businesses and other facilities had lost electricity, according to national power company Comisión Federal de Electricidad, including 40 percent of homes in Mexico City.Moises Amador Mejia, a 44-year-old employee of the civil protection agency, was working late into the night to rescue people trapped in a collapsed building in Mexico City's bohemian Condesa neighborhood."The idea is to stay here until we find who is inside. Day and night."God bless the people of Mexico City. We are with you and will be there for you.
— Donald J. Trump (@realDonaldTrump) September 19, 2017