Recent heavy rains in the Musa River basin in Lithuania have led to the overflowing of hydropower reservoirs, and warm stagnant water rich in algae has reached Latvian territory. As a result, the water in the Musa has become murky and taken on a greenish-yellow and blue-green hue, first at the Latvian-Lithuanian border and the village of Uzvara, and then near Bauska and in Lielupe. Due to the water bloom and the rapid proliferation of green and blue-green algae, swimming in the Musa is temporarily prohibited, as they release a toxin that, when ingested by humans, causes intoxication accompanied by weakness, nausea, vomiting, and fever. A rash may also appear. For this reason, people are strongly advised not to take risks. However, if you disregard the ban, try to avoid getting water in your mouth and take a shower as soon as possible after swimming. If toxic water does get into your mouth, take activated charcoal to prevent poisoning. And remember – water from blooming bodies of water should not be consumed even after boiling (toxins do not disappear), it should not be used to water vegetables and fruits, and pets should be kept as far away from it as possible. For many of them, such water poses a threat not only of poisoning but also of death.