Brazilian hydropower operators prepare for intense rains as severe El Niño approaches

As a strong El Niño develops, Brazil’s leading hydroelectric owners—China Three Gorges and Engie Brasil—are accelerating preparations for unusually heavy rains in the south. Their actions include testing spillways, installing flood barriers, and coordinating emergency plans with downstream communities. July’s precipitation in the basin has already reached 256 % of the long-term norm, pushing reservoir storage to 88 % capacity after a low-point earlier in the year.

Meteorologists at INPE note the El Niño will likely intensify southern rainfall while increasing drought risk in the Amazon, a pattern that previously forced shutdowns and reliance on fossil fuels. Grid operator ONS data underscore the heightened alert for energy security. Both firms have moved up risk-management schedules, adding monitoring and preventive measures to safeguard generation and local populations.