Texas winter storms and your electricity plan.

In February 2021, Winter Storm Uri knocked out power to more than 4.5 million Texas homes. 246 Texans died. Some who kept their power received bills of $5,000, $10,000, even $17,000 for a single week of electricity. Five years later, most Texans still don't fully understand why some households got hit with catastrophic bills while others didn't. The answer is almost entirely about the electricity plan people were signed up for.

This guide is not about doom or fear. It's about the specific, checkable things on your electricity plan that determine what happens to your bill if Texas has another significant winter event. Some plans provide almost complete protection. Others expose you to ERCOT's wholesale market. Knowing the difference before the next storm hits is genuinely worth the 15 minutes it takes to read this.

What actually happened in February 2021

Between February 10 and February 20, 2021, an unusually severe winter storm hit Texas. Temperatures dropped to single digits across most of the state, including areas that rarely see freezing conditions. The impact on the electricity grid was catastrophic.

The failure happened in three stages. First, natural gas infrastructure — pipelines, wellheads, and processing facilities — froze because most of it was not weatherized for extreme cold. Natural gas is the fuel for roughly half of Texas's electricity generation. When gas supply failed, gas-fired power plants had to shut down.

Second, wind turbines, coal plants, and a nuclear reactor also went offline. This is often blamed disproportionately on wind, but the reality is that every fuel source failed. Natural gas failures accounted for the majority of lost generation capacity.

Third, ERCOT — the operator of Texas's electricity grid — was forced to implement rolling blackouts to prevent a complete grid collapse. But the "rolling" part largely didn't work. Millions of homes went dark for days at a time, in single-digit weather, with no heat.

During those days, wholesale electricity prices on ERCOT's market hit the maximum allowed price cap of $9,000 per megawatt-hour. For context: normal ERCOT prices average around $30 per megawatt-hour. Prices were roughly 300 times normal. And a small number of Texas households on wholesale-indexed plans received these prices directly.

The February 2021 bill shock: what actually happened

Most Texans on standard fixed-rate or bill credit plans received normal or slightly elevated bills during and after Uri. Their contracts locked in a per-kWh rate that did not change when ERCOT prices spiked. Their REPs absorbed the wholesale market pain instead of passing it through.

However, a smaller group of Texans — customers of a company called Griddy and similar "wholesale-indexed" plans — received bills that reflected real-time ERCOT prices. Griddy customers paid the actual wholesale rate for each hour of electricity they used during the freeze. Because those wholesale rates hit $9,000/MWh for extended periods, individual customers received bills of $5,000 to $17,000 for a single week of usage.

Griddy itself went out of business shortly after. Several other Texas REPs also collapsed because they had exposure to wholesale prices that they couldn't recover from customers. Provider of Last Resort (POLR) service caught the customers whose REPs disappeared, but it was expensive and short-term.

What ERCOT has and hasn't fixed since 2021

Texas's response to Uri has been substantial but incomplete. Here's an honest assessment.

What's better now

The Public Utility Commission of Texas (PUCT) and the Texas Railroad Commission (which regulates gas infrastructure) have implemented weatherization requirements for both power plants and natural gas facilities. These rules went into effect in 2022 and continue to be phased in. Independent inspections have found that most major power generators have made meaningful investments in cold-weather resilience.

ERCOT itself has changed its market rules to keep more "reserve" generation online during winter, which provides more buffer if some plants fail unexpectedly. Emergency communication protocols with utilities and REPs have been improved.

Wholesale-indexed retail plans of the Griddy variety are now essentially gone from the Texas market. The PUCT put restrictions on them after 2021, and public awareness has effectively killed demand for the category.

What isn't fixed

Full winterization of Texas's massive natural gas infrastructure remains incomplete. Some smaller producers still don't meet the standards. Gas pipeline systems in remote areas are particularly vulnerable.

The Texas grid remains disconnected from the eastern and western U.S. grids (this is a deliberate historical choice that allows Texas to avoid federal regulation). During extreme events, Texas cannot easily import power from other states. This structural limitation has not changed.

Climate variability means winter cold events may occur with greater intensity even as average temperatures rise. Uri was a 1-in-40-year storm; some analyses suggest similar events may become more frequent.

How your plan type affects your winter risk

Your electricity plan falls into one of a few categories. Each has a very different risk profile during extreme weather.

Plan type	Winter storm risk	Recommended?
Fixed-rate	Very low. Rate is locked regardless of wholesale prices.	Yes
Bill credit	Low for rate. Complicated by usage-window rules — see below.	Sometimes
Variable-rate	Medium. Provider can (and does) raise rates during price surges.	No
Wholesale-indexed	Very high. You pay actual ERCOT market prices.	Never
Time-of-use	Low if the peak/off-peak structure is disclosed clearly.	Situational

The dominant vast majority of Texas plans sold today are fixed-rate or bill credit. Wholesale-indexed plans are near-extinct in the retail market. Variable-rate plans still exist and are sometimes bundled with introductory promotional rates, so read carefully.

Fixed-rate: the winter protection default

A fixed-rate plan locks your per-kWh rate for the length of your contract, typically 12 to 36 months. If ERCOT wholesale prices go to $9,000/MWh during a winter storm, your rate does not change. Your REP absorbs the wholesale market cost.

This is the default safe choice for winter risk protection. Nearly all Texas plans marketed as "fixed rate" on their Electricity Facts Label genuinely are fixed for their contract term. The small print may include exceptions for regulatory pass-throughs (like new state fees), but these are minor and predictable.

Fixed-rate plans typically cost 0.5-2 cents per kWh more than the cheapest variable-rate alternatives. For a Texas household using 1,500 kWh per month, that's $7.50 to $30 per month of premium. In exchange, you get complete predictability regardless of what happens on the grid. It's a reasonable trade for most households.

Bill credit plans during winter

Bill credit plans (extensively covered in our Bill Credit Trap guide) are technically fixed-rate underneath, but the "monthly credit" mechanism creates complications during unusual weather.

Winter usage patterns in Texas differ dramatically from summer. Most Texas households use less electricity in winter than summer (typical winter usage: 700-1,200 kWh; typical summer usage: 1,500-2,500 kWh). If your bill credit plan requires usage between 1,000 and 2,000 kWh to trigger a credit, you may miss the credit window in mild winter months.

During an actual freeze event, however, heating demand surges. Homes with electric heat may see their monthly usage double from the previous month. This can push you into or above the credit window unexpectedly. Whether that helps or hurts you depends on the specific plan structure — read the EFL carefully.

Variable-rate plans: the hidden winter risk

Variable-rate plans allow the REP to change your per-kWh rate month-to-month, typically with 15 days notice. During normal months, variable rates can be competitive with fixed rates. During extreme weather events, REPs almost universally raise variable rates significantly to cover their wholesale market exposure.

Real example: some variable-rate plans that averaged 8-10 cents per kWh in 2020 saw rates jump to 15-25 cents per kWh in the months following Winter Storm Uri, and stayed elevated for 60-90 days. Customers on those plans paid an extra $50-150 per month for months as REPs recovered their costs.

Unless you're deliberately timing a short-term move and expect to switch plans quickly, variable-rate plans are usually not worth their small monthly savings. The extreme-weather months erase the savings and then some.

The wholesale-indexed plans that caused Uri bill shocks

Wholesale-indexed plans (the "Griddy" model) pass real-time ERCOT wholesale prices through to residential customers. During normal conditions, these prices are very low — sometimes negative during high-wind periods. The pitch was that customers could save significantly by paying wholesale rates directly.

The catastrophic risk is that wholesale rates spike during extreme weather. Texas's wholesale market price cap is $9,000/MWh (nine dollars per kWh). At that price, a household using 100 kWh in a single day pays $900 for that day of electricity. Uri caused wholesale prices to sit at or near the cap for extended periods.

These plans are effectively gone from the Texas market as of 2026. The PUCT restricted them, public awareness eliminated demand, and Griddy itself no longer exists. If you're currently on any plan that mentions "wholesale," "spot market," "real-time pricing," or "index" pricing in its EFL, switch immediately — this category should not be considered under any circumstances.

What to check on your EFL before winter

Your Electricity Facts Label discloses everything you need to know about winter risk. Four specific things to check on the EFL of your current plan (or any plan you're considering).

City-specific Texas winter risk notes

Not all Texas cities face equal winter storm risk. Geographic location, TDU territory, and infrastructure age all matter.

Houston and coastal Texas

Coastal areas experience less severe cold on average, but rare severe events (like Uri) hit hard because homes are less insulated for cold. Houston households should prioritize fixed-rate plans and ensure their pipes are insulated for freeze protection separately.

DFW and North Texas

DFW gets more consistent winter cold than the coast, so homes are typically better insulated. However, Dallas, Fort Worth, Plano, and surrounding cities are also on the Oncor grid, which experienced significant outages during Uri. Standard fixed-rate protection applies.

West Texas and the Panhandle

West Texas gets the coldest weather in the state, with significant snow and ice in the Panhandle. Homes are generally built for cold. Wind generation infrastructure is concentrated here and can be affected by icing events. Fixed-rate plans strongly recommended.

South Texas and Rio Grande Valley

Rare freezes hit hardest here because homes are essentially never built for cold. Corpus Christi, Laredo, and Brownsville households should ensure their electricity plan is fixed-rate and consider backup heating (propane, wood) for the rare severe event.

What to do BEFORE the next winter event

Practical checklist to work through in September or October, well before winter arrives.

What ERCOT storm events mean for your day-to-day electricity use

When a winter storm event is forecast, ERCOT will typically issue advisory notices 48-72 hours ahead. These are worth monitoring, though they don't require action for most residential customers on fixed-rate plans.

If ERCOT calls a "Conservation Alert" or "Emergency Energy Alert," it means grid demand is approaching supply capacity. Conservation actions are voluntary but genuinely helpful: reduce non-essential electricity use, lower your thermostat by 2-3 degrees, and delay running large appliances.

If rolling outages become necessary, they're managed by your TDU (Oncor, CenterPoint, AEP, etc.) — not by your REP. Your REP has no influence over whether your power goes off during grid emergencies. Save your TDU's outage report number, not your REP's customer service line.

The bottom line

You have very limited control over whether Texas has another winter storm event or how the grid responds if it does. What you completely control is which electricity plan you're on when it happens.

A fixed-rate plan with a contract term covering the full winter season is the single most important protection against another catastrophic bill event. It costs marginally more than the alternatives during mild months and provides complete protection during severe ones. For most Texas households, this is a straightforward trade worth making.

If you're not sure what plan you're on right now, take 5 minutes to check your EFL. If you're on anything but a straight fixed-rate plan, take 15 minutes to compare current fixed-rate plans in your ZIP and consider switching before winter arrives. The window for making this change without pressure is right now — August through October — before demand for switches picks up in November.