'Biblical' weather is hammering Spain with violent storms unleashing 100kph winds, flash floods, and chaos across the country.

Dramatic video shows palm trees snapping in half in Alicante and streets in Majorca turning into rivers as the Med braces for 'hazardous' thunderstorms and 'extreme' flooding.

It comes after forecaster Severe Weather Europe warned of 'extremely high rainfall' in three zones across the north-central Mediterranean on Wednesday and even possible tornadoes along Italy's western coasts.

Much of Alicante was placed on orange and yellow alerts on Monday for extreme rainfall and strong winds.

AEMET, also issued a red alert for the southern coastal and pre-coastal areas of Tarragona Monday due to the threat of torrential rain.