Prolonged heat can lead to serious health conditions such as heat exhaustion, heat stroke, and heat cramps. Vulnerable groups, including older adults, children, and those with pre-existing health conditions, are at heightened risk. Pets are also susceptible to heat stress, particularly those with thick coats or short muzzles. Urban heat islands in San Antonio, areas with less greenery and more pavement, exacerbate the heat, increasing risks for residents in these neighborhoods. The city has also highlighted the dangers of leaving children or pets in vehicles, which can quickly become life-threatening.