Unprecedented cold weather across the United States continued to disrupt energy markets on both sides of the border Tuesday as power outages hit Mexico for a second straight day.

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Mexico’s electric power operator Centro Nacional de Control de Energía (Cenace) said 2,200 MW of power was still offline in the northern states of Chihuahua, Coahuila, Nuevo León and Tamaulipas, and pleaded Tuesday for the efficient use of energy as the crisis was still days from being over.

Rolling blackouts were planned on Tuesday evening throughout Mexico in Aguascalientes, Colima, Estado de México, Guanajuato, Guerrero, Jalisco, Michoacán, Nayarit, Puebla, Querétaro, San Luis Potosí and Zacatecas.

Cenace and Mexican state utility Comision Federal de Electricidad (CFE) blame limited...