More than 200 people have died in Spain after nearly a year’s worth of rain fell in a matter of hours.
On Friday, there were at least 205 confirmed deaths in Valencia, two in Castilla La Mancha, and one in Andalusia.
Local authorities issued warnings late on Tuesday, but many say this gave them next-to-no time to prepare for the conditions that had killed dozens by Wednesday.
Follow Spain flooding latest
Here we look at what caused the flooding – and why they could happen again.
How quickly did the floods hit?
Heavy rain had already begun in parts of southern Spain on Monday.
In contrast to areas like Malaga, where residents told Sky News it had been “chucking it down for two days”, the rain did not start in the worst-hit region of Valencia until around 7pm on Tuesday.
At 8pm, people in Valencia received smartphone alerts warning them not to leave their homes.
But by then, many were already trapped in dangerous conditions, particularly in the south of the city where a major road had flooded, leaving drivers stuck in their cars.
Read more
‘No one came to rescue us’
Deadly flood damage is ‘utterly random’
Deadliest weather events were fuelled by climate change
By Wednesday morning, more than 50 people had been found dead.
The Chiva area of Valencia had been hit by 491 litres per square metre of rain in eight hours. Only around 65 l/m2 usually falls in the whole of October.
Storms spread west on Wednesday night and into Thursday, bringing deadly conditions to Andalusia and Castilla La Mancha as well.
What caused them?
Heavy rain is not uncommon across eastern Spain at this time of year.
It’s caused by a weather phenomenon called DANA – ‘depresion aislada en niveles altos’ in Spanish – which translates as ‘isolated low-pressure system at high levels’.
DANA occurs when:
1) Cold air from the north moves south;
2) Warm air then blows over the Mediterranean, rising quickly and forming…
