The Negociado de Energía de Puerto Rico accepted the final investigation report from Exponent, Inc. concluding the April 16, 2025 mass blackout was caused by a tree electrical arc on 230kV line 50100 combined with rodent damage to a Cambalache circuit breaker control cable.

The finding sits beside a separate account from the governor. Jenniffer González stated on an unspecified Thursday that the same outage was caused by rodent damaged electrical cables at a LUMA Energy facility. The Exponent report names two causes acting together, the line arc and the chewed cable, not one.

The government is weighing what to do about electricity costs. Jean Peña Payano, Public Affairs Secretary of La Fortaleza, stated on a Tuesday that the government is evaluating potential electricity cost recovery actions. Peña Payano also stated the government is evaluating reimbursement claims against New Fortress Energy.

In an unrelated matter, released documents confirm ICE submitted an administrative information request, not a judicial subpoena as the Puerto Rico government had stated. And the Puerto Rico National Guard said Adjutant General Carlos J. Rivera Román visited 153 Puerto Rican troops deployed in Washington DC, a deployment he stated has been extended to May 2027.