How much warning will I get before a flood?

For large rivers, 24-48 hours. For smaller rivers, 2-6 hours. Coastal flooding depends on tide times and storm tracking. Surface water may give only 1-2 hours.

Is the flood warning service free?

Yes, completely free. Register at gov.uk to receive warnings by phone, text, email, or all three.

Why didn't I receive a flood warning?

You may not be in a designated flood warning area, or the flooding may have been from a source not covered. Check your registration details and contact the EA.

Flood Warning Systems — Complete Guide

The UK's Flood Warning System

How It Works

The Environment Agency operates over 1,000 monitoring stations measuring river levels, rainfall, tidal levels, and groundwater. This data feeds into forecasting models that predict when and where flooding may occur.

Warning Levels

Flood Alert (Be Prepared): Flooding is possible. Monitor the situation and prepare your flood kit.

Flood Warning (Act Now): Flooding is expected. Deploy flood defences, move valuables upstairs.

Severe Flood Warning (Danger): Severe flooding with danger to life. Follow emergency service instructions.

How to Register

Visit gov.uk and search for 'flood warnings'
Enter your postcode to find relevant warning areas
Choose notification method: phone call, text, email, or all three
Registration is free

Other Information Sources

EA flood information line: 0345 988 1188 (24 hours)
@EnvAgency on X: Real-time updates during events
Check For Flooding: EA's real-time map showing live warnings and river levels
Local news and radio: Carry flood warnings during events

Limitations

The system works best for river and coastal flooding. Surface water flooding from intense local rainfall is harder to predict and warnings may arrive with less notice.