SAN ILDEFONSO, Ilocos Sur, Philippines — Floodwaters may disappear when the rains stop, but health officials are warning that another danger could remain behind.
The Ilocos Region has recorded 85 cases of leptospirosis and six deaths from January 1 to August 8, as persistent rains and flooding continue to expose communities to potentially contaminated water, according to regional health surveillance data.
The Department of Health (DOH) has urged residents to avoid unnecessary contact with floodwaters, warning that leptospirosis—a potentially deadly bacterial disease—can spread when contaminated water enters the body through cuts, wounds, or other openings in the skin. The infection is commonly associated with the urine of infected animals, particularly rats.
While the region’s total number of cases is 52 percent lower than the 177 cases reported during the same period in 2025, the six deaths remain a serious concern as flooding continues across parts of Northern Luzon.
Pangasinan recorded the highest number of cases with 46, followed by La Union with 13, Ilocos Norte with 12, and Ilocos Sur and Dagupan City with six cases each, according to the latest figures.
Floods May Be Gone—But the Health Risk Can Remain
The warning in Ilocos comes as health authorities monitor a broader leptospirosis threat across the Philippines following weeks of heavy rains and widespread flooding.
Nationwide, the DOH reported 4,285 leptospirosis cases as of August 22, although that total was lower than the figure recorded during the same period last year. Officials have nevertheless warned that cases could continue to rise after recent flooding because the disease may take several days to develop following exposure.
The government has also strengthened its response, with the DOH activating specialized hospital fast lanes and monitoring bed capacity in affected regions. Health authorities have stressed that people exposed to floodwaters should not ignore possible symptoms and should seek medical advice promptly.
The danger is not limited to the Ilocos Region. Recent reports from other parts of the country have also highlighted rising infections following severe monsoon rains, including a spike in cases in Quezon City. The pattern has reinforced a familiar public health warning during the rainy season: floodwater is not just dirty—it can carry potentially life-threatening disease.
DOH Urges Residents to Take Precautions
Health officials advise people to avoid wading or swimming in floodwaters whenever possible. Those who have been exposed should clean themselves thoroughly and pay close attention to their health, particularly if they develop symptoms such as fever, muscle pain, headache, or other signs of illness.
Residents are also encouraged to consult a healthcare professional as soon as possible after significant flood exposure or if symptoms appear, rather than waiting for the condition to worsen.
As rains continue to affect communities across Luzon, the growing concern is clear: the immediate danger of flooding may be visible, but the health threat that follows can be harder to see—and potentially just as deadly.
For families in flood-hit areas, the message from health authorities is simple: stay out of contaminated water when possible, protect open wounds, and do not delay seeking medical attention if you feel unwell.
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