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Kerala faces lightning and rough-sea alerts today, Friday, 18 September 2026. The India Meteorological Department warns of thunderstorms with lightning across south and central districts. Gusty winds may reach 40 to 50 kilometres per hour at isolated locations. A swell surge is forecast for Thiruvananthapuram and Kollam from 23:30 tonight to 23:30 Saturday. Beach caution is advised through the night.
City forecasts keep the spotlight on Thiruvananthapuram and Kollam today. Both bulletins flag “Thunderstorm accompanied with Lightning.” Short rain bursts could disrupt traffic and power. Flyers and rail passengers should add buffer time around evening departures. Households should secure balconies, move light furniture indoors, and charge devices during daylight.
Kerala lightning alert: IMD warns of thunderstorms
IMD and the state disaster authority urge live monitoring through the day. Use the district-wise warning map and the nowcast portal for three-hour updates. The table below highlights today’s focus districts, drawn from city forecasts and statewide alerts. Treat it as guidance, and refresh before travel or outdoor work.
| District | IMD status today | Practical advice |
|---|---|---|
| Thiruvananthapuram | Thunderstorm with lightning likely; rain spells possible | Unplug electronics; avoid tall trees; add travel buffer |
| Kollam | Thunderstorm with lightning likely; rain spells possible | Park away from weak hoardings; keep torches ready; avoid beach at night |
| Idukki | Isolated thunderstorms possible; gusts up to 40–50 km/h | Stay off ridgelines; watch for treefall on ghat roads |
| Ernakulam | Isolated thunderstorms possible; brief disruptions possible | Check nowcast before commutes; secure loose rooftop items |
Coastal swell surge for Thiruvananthapuram–Kollam: timings and safety
IMD’s coastal bulletin carries a clear note: “SWELL SURGE ALERT FOR THE COAST OF THIRUVANANTHAPURAM, KOLLAM, KERALA.” The advisory pegs wave period between 15 and 18 seconds and height around 0.8 to 1.4 metres. Port signals are presently NIL, yet nearshore surging is possible. Fisherfolk and beachgoers should avoid venturing out, especially near breakwaters.
Lightning safety remains the priority inland this afternoon and evening. Avoid open fields, metal fences, and lone trees during thunder. Unplug appliances and switch to mobile data if needed. Expect spot waterlogging and treefall with gusts. Keep state helplines handy and report hazards promptly to local authorities.
Alerts can tighten or relax through Friday as clouds pulse and winds shift. For the latest status, check IMD’s district warnings and city pages before travel. Note the swell surge window from 23:30 tonight until 23:30 Saturday for Thiruvananthapuram–Kollam. Plan evening outings and coastal drives accordingly, and refresh advisories before heading out.