Fort Worth summers are not gentle. By mid-June, triple-digit days are the norm, and for pregnant women, that heat is more than uncomfortable — it is a genuine medical concern. Pregnancy changes the way your body handles heat at a physiological level, and extreme temperatures have been linked to real complications at every stage, from the first trimester through the final weeks.
The good news is that with a few deliberate habits, you can stay cool, stay hydrated, and keep both of you safe through even the hottest Texas days.
Your body is already working overtime. During pregnancy, your blood volume increases significantly, your heart rate runs higher, and your cardiovascular system is under greater baseline demand. When you add external heat, your body has less reserve to dissipate it. That means you overheat faster than you would otherwise, and dehydration sets in more quickly.
The primary risk is hyperthermia, defined as your core body temperature rising above 102.2°F. Reaching that threshold, especially in the first trimester, has been associated with an increased risk of neural tube defects. Across all trimesters, heat exposure has been linked to preterm birth, low birthweight, and stillbirth, with risk rising as temperatures increase and duration of exposure lengthens. The CDC has confirmed that as little as one day of high heat can increase risk.
This isn’t meant to frighten you. It’s meant to give you a clear reason to take the practical steps below seriously.
Knowing when to act is the most important skill. The following are signs of heat exhaustion — the stage before heat stroke, and the point where you need to get inside and cool down immediately.
If you stop sweating, feel confused, or your temperature reaches 104°F — those are signs of heat stroke, which is a medical emergency. Call 911.
Pregnant women in the heat need to drink at least 64 to 80 ounces of water per day, and more if you’ve been outdoors or physically active. That’s roughly 8 to 10 cups minimum.
Water is always the best choice. On days when you’ve been sweating heavily, an electrolyte-containing drink can help replace sodium and potassium. Limit drinks high in sugar, sodium, and caffeine — they can accelerate dehydration rather than prevent it.
Watch your urine color as a quick gauge: pale yellow means you’re hydrated. Dark yellow or amber means drink more now.
One nuance worth knowing: if you take iron supplements (which many pregnant women do), they can darken urine color slightly. When in doubt, add more water regardless.
Several medications commonly taken during pregnancy can reduce your body’s ability to tolerate heat, including antihistamines (for allergies), antihypertensive medications (for blood pressure), and diuretics. If you take any of these and are planning outdoor time in summer, it’s worth reviewing with us whether your dosing schedule or timing should be adjusted on especially hot days. Do not stop any medication on your own — just bring the conversation to your next visit or give us a call.
Please don’t wait for your scheduled appointment if you notice any of the following:
Fort Worth summers are long, and they are going to keep getting hotter. You don’t have to spend the next three months inside, but you do need to be intentional. A few habit changes now — earlier outdoor timing, consistent hydration, air conditioning as a tool rather than a luxury — can make a real difference in how you feel and how safely your pregnancy progresses.
You’ve got this.
If you have any concerns or questions about managing heat and staying safe during your pregnancy, feel free to reach out to us. We’re here to support you every step of the way.