Electric power transmission
Brazos Electric Power Cooperative Inc. is one of dozens of electricity providers facing blackout-related charges stemming from last month's severe cold snap.
Video footage showed a glowing mass traveling over the power lines as a transformer went down.
Pacific Gas & Electric turned off power to 172,000 customers to try to prevent its power lines and other equipment from sparking more fires.
A derecho can cause damage more like an inland hurricane than a quick, but more powerful tornado.
WHAT'S HAPPENING
Outages are planned in more than half of California’s 58 counties, although not everyone in those counties will have their power cut.
Electricity is almost fully restored as of Sunday evening to Argentina, Uruguay and Paraguay, after what one leader called an "unprecedented" power failure.