ERCOT is still an island,
and it runs thin
at both extremes.

The February 2021 winter storm (informally Uri) was a sustained cold-weather event that produced sub-freezing temperatures across most of Texas for roughly seven days. Natural-gas wellheads froze; gas-fired generators starved of fuel; wind and solar generation underperformed in cold-weather conditions; nuclear plants tripped offline as cooling water systems froze. The grid lost roughly 50 percent of its generating capacity at the peak of the event.

ERCOT initiated rolling blackouts to prevent total grid collapse. The blackouts persisted for three to seven days for most affected customers. The Texas Department of State Health Services official death count was 246; an independent peer-reviewed analysis published in the BMJ in 2022 estimated roughly 700 deaths attributable to the storm and the grid failure, the discrepancy being primarily under-reported indirect deaths from hypothermia, carbon monoxide poisoning from improvised heating, and untreated medical conditions during the outage.

The post-Uri legislative response (Senate Bill 3, 2021) mandated weatherization for power-generation facilities and natural-gas suppliers, increased emergency-coordination requirements between ERCOT and the Public Utility Commission, and required Texas Railroad Commission rules for cold-weather natural-gas supply. Compliance with these rules has been uneven; the 2024 winter storm season produced no large-scale outages despite cold weather of comparable severity to non-Uri winters. The 2026 January winter-storm event (smaller than Uri) produced localized outages in pockets of Central Texas but no statewide rolling blackouts.

1. A portable battery and a propane camp stove. The lowest-cost intervention. A 1.5 to 2 kWh battery (Anker, EcoFlow, Bluetti) runs $400 to $800 and powers a CPAP, a refrigerator, phones, and lights for two to four days. A propane camp stove and two 1-pound canisters run $80 and produces hot food and water for a week. Together: $500 to $900, covers most household needs during a 3-to-7-day outage.

2. A redundant cooling plan for summer. Most central-Austin houses have a single central HVAC system. A failure of that system in August is a public-health event for households with anyone over 65 or under 5. Backup options: a window-unit AC for one bedroom ($250 to $500), or a friend or relative within walking distance who has reliable AC. The redundancy is what matters; the specific implementation is flexible.

3. A natural-gas range or stove. Most Austin houses have all-electric kitchens. A natural-gas range continues to work during a power outage if the gas line is supplied. The cost is the gas hookup ($1,500 to $5,000 retrofit; built-in for new construction in many neighborhoods).

4. A whole-home generator. The most expensive intervention. A natural-gas-fueled standby generator (Generac, Kohler) runs $8,000 to $15,000 installed and powers the whole house automatically during an outage. The math works for households where someone is medically dependent on power (oxygen, dialysis), or households with high-value frozen inventory, or households that work from home and cannot afford even a one-day outage.

5. Solar plus battery. The most expensive and the highest-leverage. A 6 kW solar array plus a 13 kWh Tesla Powerwall or equivalent runs $25,000 to $40,000 installed (before tax credits). The math works in Austin because the post-2021 incentive landscape (federal ITC, Austin Energy rebates) is favorable, the sun-hour count is high, and the system pays for itself in 7 to 11 years on electricity-bill savings alone before considering grid-resilience value.