Texas power grid withstands record-breaking heatwave, but past failures raise concerns

Demand for electricity in Texas reached new highs due to extreme heat.
The Electric Reliability Council of Texas says there are enough resources to meet demand.
Some worry the grid cannot reliably handle more common extreme weather events.
Increasing economic growth and migration to Texas is expected to further strain the grid.
Heat waves with triple-digit temperatures will continue in parts of Texas for over a week.