* WHERE.Portions of south central and southeast Texas. HEAT ADVISORY NOW IN EFFECT UNTIL 9 PM CDT SUNDAY. * WHERE.San Jacinto, Polk, Northern Liberty, Inland Harris, Chambers, Inland Galveston, Southern Liberty, Coastal Harris and Coastal Galveston Counties. * IMPACTS.Hot temperatures and high humidity may cause heat More * WHERE.Houston, Trinity, Madison, Walker, Burleson, Brazos, Washington and Grimes Counties. Schedule frequent rest breaks in shaded or air-conditioned environments if working outside.HEAT ADVISORY NOW IN EFFECT UNTIL 9 PM CDT SUNDAY. Wear lightweight and loose-fitting clothing when possible. Know the signs and symptoms of heat exhaustion and heat stroke. Try to reschedule strenuous activities to early morning or evening. The weather service also urges residents under heat alerts to: According to, as many as 948 children have died from vehicular heatstroke in the past 25 years, including 22 last year. Young children and pets should never be left unattended in vehicles under any circumstances. Stay out of the sun, and check up on relatives and neighbors. The weather service recommends these actions while the Houston area faces extreme heat: What should you do while under a heat dome? This feature will keep a deep connection to tropical moisture, while high pressure in the mid-levels limit daily rain chances. The influx of muggy conditions will linger as prevailing winds remain off of the Gulf of Mexico. TEXAS GRID CONDITIONS: ERCOT nears all-time demand record amid heatwave Texas heat tracker: Use our interactive maps and charts to see current conditions and historical data for where you live ➔ How long will the Texas heat dome last?ĭon’t expect the high air pressure or “ridging” will end for at least another five to seven days. We’ll likely spend much of mid-July with triple-digit temperatures. National Weather Service forecast maps show a high-pressure system located in the mid-levels of the atmosphere over the West Texas Panhandle.įor the Houston area, a heat advisory remains in place through Wednesday evening. Between high pressure at the surface over the Gulf of Mexico and the mid-level ridge in place over West Texas, the high heat levels are not likely to change through at least early next week. The heat dome roasting Texas like a side of beef this week is a system of high pressure that isn’t budging anytime soon. Without rain, nothing keeps existing hot air from getting hotter, according to the National Weather Service.įORECAST: Houston's extremely hot weather won't let up: Heat misery to persist until next weekend Under a heat dome, the high-pressure system forces air downward and prevents air near the ground from rising and turning into rain. But the high-pressure system affecting Texas is keeping clouds from forming, which means clear skies but also the prospect of relentless heat from sunshine. In low-pressure systems, the rising air can carry water vapor into the colder reaches of the atmosphere, where it can condense and turn into rain. Meanwhile, powerful high pressure systems can sometimes park themselves over one spot and create what we think of as a heat dome.
Low pressure systems, when fueled by a steady diet of summertime heat and warm ocean temperatures, can strengthen to become tropical cyclones like Bret and Cindy. This summer, we’ve seen some of the most extreme versions of high and low pressure systems. Some turn counterclockwise and allow air to flow upward, leading to spots with lower air pressure. Some turn clockwise and force air downward, producing areas with higher air pressure. TEXAS HEAT TRACKER: How hot is it in Houston today, and is the temperature normal?Īs the Earth rotates, eddies of dense air circulate in the upper atmosphere.
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