The service covers Spain: pick your Spanish town or city and the minimum warning level. When our hydrological system detects risk in your river basin, we alert you right away. Free, no app, one-click unsubscribe.
With your town we identify the river basin that affects you (Segura, Júcar, Ebro, Guadalquivir...), the real unit where floods develop.
Our hydrological engine cross-checks observed and forecast rainfall against flow thresholds for each basin, every few minutes.
If your minimum level is exceeded, you receive an email with your town in the subject line, the warning details and links to the live map.
Warnings for significant rainfall and flood or river-rise risk computed for your town's river basin, in yellow, orange and red levels. We only send an email when there is a warning at or above your minimum level, with a maximum of one email every 30 minutes.
Completely free. Every email includes a one-click unsubscribe link and another link to change your preferences.
With the town we locate your exact basin and personalise the email subject so you can tell at a glance that the warning concerns you.
No. It is complementary. Official warnings in Spain come from AEMET and Civil Protection (ES-Alert): in an emergency, always follow official instructions.
Official weather warnings in Spain are issued by AEMET under the Meteoalerta plan, and they should not be confused with the hydrological alerts on this page: AEMET’s are the official reference and describe the meteorological phenomenon; ours are a complement that watches how the river basin responds. The colours mean this:
| Level | What it means | What to do |
|---|---|---|
| Green | No significant meteorological risk. No warning is issued: green is the absence of a warning, not a warning that nothing will happen. | Normal activity. |
| 🟡 Yellow | Risk to some specific activity. The phenomenon is usual for the area but can be dangerous depending on what you are doing. | Stay informed and avoid exposed activity: mountains, sea, work at height. |
| 🟠 Orange | Significant meteorological risk. The phenomenon is unusual for that area and may cause damage and disrupt travel. | Postpone journeys and outdoor activity. Check drains and downpipes. |
| 🔴 Red | Extreme risk. An exceptionally intense phenomenon, with a very high level of risk to the population. | Do not go out unless necessary. Follow Civil Protection instructions. |
This is the most misread point. The thresholds that trigger each colour are set by AEMET zone by zone, not nationally, because the same number does not mean the same thing everywhere: 40 mm in an hour is a stormy afternoon in inland Galicia and a serious episode in Almería, where neither the ground nor the drainage is built for it. Spain is divided into some 180 warning zones, each with its own thresholds per phenomenon.
The practical consequence is that a yellow warning in one province can correspond to a larger amount than an orange in another. Comparing colours between provinces tells you nothing; what tells you something is the colour against what is normal there, which is exactly what the colour already encodes. So «it is only yellow» makes no sense: it means it is bad enough for that area to be worth a warning.
AEMET issues a warning when the probability of exceeding the threshold is high enough, not when it is certain. An orange warning that passes without consequence was not wrongly issued: it means the episode, which was likely, fell on the side of the distribution where it does not happen, or unloaded fifty kilometres further on. Warnings are issued by phenomenon and by time window — rain, wind, snow, coastal, temperature, thunderstorms, airborne dust — so the same zone can be orange for rain and green for wind on the same day.
Official warnings are at aemet.es and in AEMET’s own app. Evacuation orders come from Civil Protection. In an emergency in progress, the number in Spain is 112.
