It's understood the man entered the water to help the woman after she fell into difficulty.
According to reports an off-duty pilot who was a passenger helped to land the plane.
Reports suggest the bus lost control and fell on top of a house.
It comes as footballer denies allegation of rape.
Poor visibility has hampered search efforts.
Three people have died from heatstroke in Spain amid record-breaking temperatures.
Cristiano Ronaldo and Lionel Messi, perhaps playing in their final World Cup, saw their hopes dashed on Saturday night, when both Portugal and Argentina were knocked out.
The couple fell from a 40-metre high wall overlooking a beach in the resort of Ericeira.