Widespread blackouts in early May across 21 of Mexico’s 32 states are a troubling sign ahead of summer months, which is when the nation’s electricity demand peaks, according to three industry experts who spoke with NGI’s Mexico GPI.

“I think it’s going to be a spring and summer of constant blackouts. Not daily, but frequently,” Eduardo Prud’homme, head of Mexico energy consultancy Gadex, told NGI’s Mexico GPI. “Given Mexico’s demand profile, I think the country’s going to be very vulnerable this summer.”

On nine of the first 13 days of May, Mexico’s power system operator Cenace issued an alert that the national electricity grid was at risk of outages. Meanwhile, natural gas imports from the United States to help combat the problem have surged and...