By Jon Nazca and Marco Trujillo

PILAR DE LA HORADADA/ORIHUELA, Spain (Reuters) – Four people have been killed and over 1,500 evacuated in two days of torrential rains in southeastern Spain, with many roads, train networks and an airport closed on Friday and emergency services rescuing people stuck in flooded highway tunnels.

Floods swept away cars and debris in the regions of Valencia, Murcia and eastern Andalucia. Motorway tunnels in some areas were flooded almost up to the tunnel lighting, with some vehicles partly or fully submerged.

A man was found dead in Granada province on Friday after his car was swept off a motorway and another died in Almeria after trying to drive through a flooded tunnel, rescue services said. Two siblings died on Thursday when torrential rain dragged their car away.

A total of 74 roads were closed, as was the whole Murcia regional railway service, and the Murcia airport. The railway link between Alicante and Spain’s two main cities – Madrid and Barcelona – was shut, acting Interior Minister Fernando Grande Marlaska said.

Some affected areas saw record daily rainfall for the month of September.

“The situation is critical, all the municipality is full of water,” Mario Cervera, mayor of the town of Alcazares, one of the most affected in Murcia, told Spain’s state-run TVE channel.

Rescue workers were using a helicopter and boats in various areas, he said.

“This man was holding onto a traffic sign… the officer and I jumped to take him out,” one emergency worker told Reuters.

In addition to people already evacuated, some 2,000 residents of the town of Santomera in Murcia were being removed from their homes due to a planned controlled release from a local dam to avoid its overflowing, the interior minister said.

“The forecasts do not point to a worsening of the situation, but we have to be cautious,” he told reporters after a weekly cabinet meeting before heading to the affected areas.

The rain appeared to be easing but rivers were still at risk of overflowing, including the Segura, which has already flooded the town of Orihuela in Alicante and could flood in the city of Murcia, the local water management authority said.

Authorities have recommended citizens stay at home in the affected areas and avoid using their cars.

Tourists were left stranded in Alicante airport as many flights were delayed or canceled.

“We’ve been in the queue here four or five hours, it’s very difficult to get to the toilet, impossible to get anything to eat,” Haydn Harding, a 78-year old diabetic tourist from Northern Ireland, said at the airport.

(Additional reporting by Jose Rodriguez, Paola Luelmo, Emma Pinedo and Jesus Aguado; Writing by Andrei Khalip; Editing by Frances Kerry)