SAO PAULO — More than 1.3 million Sao Paulo residents remained without electricity late Thursday after strong winds caused trees to fall onto the Brazilian metropolis' grid the day before. Authorities said almost 400 flights were canceled.

Utility Enel said in a statement it had returned services to 1.2 million of its 2.2 million clients in and around Sao Paulo, but that another 300,000 lost electricity throughout Thursday.

Enel claims the issue was caused by winds of about 100 kilometers per hour (62 miles) started hitting the metropolis since Wednesday. It did not provide a deadline to finish all the fixes.

“In some parts (of the city) work is taking longer because it includes the complete reconstruction of the grid,” Enel said. The company added it is offering generators to hospitals

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