Slovakia and Hungary warn of heart risks and fines for unsafe cold‑water swimming

Health officials in Slovakia caution that a sudden plunge into cold water during the upcoming heat wave can trigger thermal shock, leading to loss of consciousness, heart failure or even myocardial infarction. The Union health insurer explains that expanded blood vessels from high temperatures contract sharply when exposed to very cold water, causing a rapid rise in pulse and blood pressure. Symptoms such as chest pain, dizziness or severe weakness require immediate exit from the water and medical help. Police recently rescued a woman who was unresponsive for ten minutes after a cold‑water immersion.

In Hungary, authorities stress that swimming is permitted only at designated natural bathing sites. Entering prohibited areas such as ship lanes, bridges, canals or former mine pits can pose drowning hazards and attract fines of up to ten‑thousand forints. Experts note hidden obstacles, sudden depth changes and strong currents as additional dangers. Both countries advise gradual cooling of the body—first the limbs, face and neck—rather than an abrupt full‑body dip, and recommend swimming with companions so that rapid assistance is available if health issues arise.