Flood Time Machine — multi-hazard risk & emergency routes

Flood Time Machine

Chennai · multi-hazard risk · least-risk emergency routes · 2005 → 2070

offline · no internet needed

Your address

Tap anywhere on the map to drop the pin on your own street.

Flood risk scoreToday

–

pick an address

hazard (depth + history) –

low ground –

built-up –

score –

bars sum to the score · hazard packs depth (40%) + history (20%)

ground height: –
water depth: –
floods when: –
residents here: –
critical sites: –
landslide susc.: –

Emergency routes · PS 1.1today

from to nearest

Green = least-risk, blue = plain shortest. Shelters are schools and community halls (how Chennai actually shelters). Cost = km × (1 + 2·risk + 3·severe): waist-deep streets are priced out.

Hazard layers · PS 1.1

0510

Each square is a 100 m cell. Colours are pre-computed risk, so the whole city is already scored before you click.

Exposed in Today

residents–

in ≥ 60 cm water–

buildings–

roads–

built-up wet– res · – com · – ind

critical sites–

hospitals · schools · police · fire · in ≥60 cm–

residents exposed

Years use different source datasets (2020: only 53 published hotspot points — sparse record), so comparisons are indicative, not exact.

Citywide, in this year's modelled water: ≥ 15 cm = affected, ≥ 60 cm = severe (waist-deep). Tap a year to re-count.