site.bta18 out of Bulgaria's 28 Districts Are under Heavy Rain Alert

The National Institute of Meteorology and Hydrology (NIMH) has issued a first-degree warning - code yellow - for significant rainfall in 18 districts of the country on Friday. In Western and Central Bulgaria the downpour is expected to reach 15 to 25 litres per square metre, in some places up to 35 litres, according to the map with warning codes for dangerous weather phenomena, published on the NIMH website