New Delhi, Aug. 3 -- The Danube is running too low and too warm to keep Hungary's main nuclear plant cooling properly, and the bill is now measured at as much as 137 million euros.

when all units resume generating electricity, what Hungary's power consumption looks like at that moment, and what electricity market prices will be in coming days.

The trouble began last week, when a record drop in the Danube's water level near Paks, in central Hungary, forced the plant's operator to reduce output on two of its four reactor units, Euronews reported. Cooling systems at nuclear plants depend on rivers for heat exchange; below a certain water level and temperature threshold, the thermal load becomes too great. By Sunday, the situation had deter...