ERCOT's calls for conservation on Monday and Tuesday have expired. The conditions that led to both calls are expected again on Wednesday morning and another call for conservation could be issued. 

The outlook shows that system-wide demand is expected to be higher tomorrow at 8:00 a.m., but supply and demand forecasts estimate the grid has enough supply.

Timing will be key because demand could spike as families will be waking up and heading back to work and school after the MLK holiday.

In a conservation appeal, Texans are asked to:

Lower your thermostat by a degree or two, if safe to do so.

Avoid using large appliances (i.e., washer/dryer etc.).

Turn off and unplug non-essential lights and appliances.

Set pool pumps to run early morning or overnight; shut off during peak hours.

Commercial Business: Turn off any lights and office equipment (or place in sleep mode) when space not in use.

Commercial Business: Turn off air-conditioning/heating outside of business hours.

An energy consultant says ERCOT should be even more specific when issuing conservation calls so that Texans head requests when they are needed most because there is a small window of time Tuesday morning when the margin between projected supply and demand will be razor thin.

"I think [ERCOT] should be more specific. It looks like the tightest time is around 7:30 to 8," said Doug Lewin, energy consultant and author of The Texas Energy and Power Newsletter.