Houston hits 90s as heat, humidity raise health risks

Houston recorded its first 90-degree temperatures of the year, prompting health officials to warn about dehydration and heat-related illness as humidity intensifies.

Ashley Livingston

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Ashley Livingston

Published 

Apr 29, 2026

Houston hits 90s as heat, humidity raise health risks

Residents throughout Houston are experiencing their initial wave of 90-degree temperatures this year. Medical professionals are cautioning that this abrupt rise in heat and humidity may elevate the risk of dehydration and heat-related illnesses.

On Monday, temperatures in the city soared into the 90s, with meteorologists predicting that these warm conditions will continue for several days. A cooling trend is anticipated to set in later this week. The blend of elevated temperatures and Gulf Coast humidity has resulted in a noticeable increase in perceived heat, with numerous individuals likening the atmosphere to that of a sauna.

Medical professionals, like Dr. Bianca Asan, Houston's emergency medicine specialist, indicate that the sudden transition from the gentler temperatures of spring can pose challenges for the body's ability to adapt.

“Individuals have grown accustomed to more temperate conditions,” remarked Dr. Asan, highlighting that many fail to foresee the necessity for adaptation. “They fail to adjust their bodies to cope with these high temperatures.”

According to data from Houston Public Media, outdoor work emerged as the primary contributor to heat-related illnesses in the city during 2022, with construction workers, warehouse employees, and firefighters being particularly affected. Extended exposure, especially in high humidity, can swiftly create hazardous situations if you fail to take appropriate measures.

Medical professionals indicate that people frequently overlook the initial indicators of dehydration. Signs may manifest as dizziness, fatigue, weakness, and confusion — indicators that the body is lacking adequate hydration.

Health experts advise that the typical adult should aim for approximately 2.5 liters of water each day, with increased consumption necessary during times of intense heat or physical exertion. Experts warn that drinks like coffee and alcohol may lead to dehydration if not countered with extra water.

“Individuals often fail to recognize that they are not adequately hydrated,” Dr. Asan noted, explaining that symptoms may initially present as “non-specific.”

Recent adjustments in local policies are tackling the challenges posed by heat risks. 

A recent report from Houston Public Media highlighted that Harris County has established new worksite standards mandating rest breaks in high-temperature conditions. When temperatures rise above 90 degrees, it is essential for workers to receive 15-minute breaks to mitigate heat exposure.

Authorities urge community members to maintain proper hydration, reduce outdoor activities during the hottest parts of the day, and ensure the well-being of at-risk groups, such as children and the elderly.

Later this week, temperatures are anticipated to drop a bit, although humid conditions are expected to continue

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