Today\'s heavy rains, which began more weakly on Tuesday, are expected to continue throughout the day, from northern Israel to the northern Negev. Judean Desert streams are expected to overrun their banks. The rains will peter out tomorrow. The level of the Kinneret Sea, Israel\'s largest reservoir, stands at 213.84 meters below sea level - still 84 centimeters below the original government-mandated \"red line\" minimum acceptable level. The level has risen 1.04 meters since the beginning of the winter, but there is concern that water availability this summer will be very low. The socio-economic ministerial forum, headed by Prime Minister Sharon, decided yesterday to increase yet again the amount of water to be desalinated by 200 million cubic meters a year.