Her ruling coalition is set to clinch a decisive win, taking two-thirds of the seats in the House of Representatives.

The Justice First party leader is among 18 political prisoners to be freed by the interim government on Sunday.

António José Seguro is on course for a landslide victory over far-right rival André Ventura, with the majority of votes counted.

Storms Marta and Leonardo have caused widespread flooding in Spain as thousands have been displaced.