THE Hydrometeorological Service of Guyana has issued a fresh flood risk advisory warning that unstable weather conditions, heavy rainfall and thunderstorms are expected to continue affecting the country through the weekend, with flood risks remaining high in low-lying and poorly drained areas until Sunday, May 24, 2026.
In its Special Information Bulletin #5, issued on Tuesday, the Hydromet Service said all regions are likely to experience significant rainfall through Wednesday as Tropical Wave #4 continues to impact the area before exiting the region on May 20.
According to the bulletin, the Inter-Tropical Convergence Zone (ITCZ) is then expected to reorganise over Guyana, resulting in another intensification of rainfall activity by Saturday and Sunday.
“The latest forecast model outputs indicate that all Regions are likely to be impacted by significant rainfall until May 20, 2026,” the bulletin stated.
Hydromet added that while a temporary reduction in rainfall is expected on May 21 and 22, conditions are forecast to deteriorate again over the weekend.
“With the exception of May 21 and 22, 2026, the risk of flooding, particularly in low-lying and poorly drained areas, remains high until May 24, 2026,” the agency warned.
Rainfall totals between 20 millimetres and 50 millimetres are expected within 12 hours tonight and tomorrow, while rainfall on Saturday and Sunday could increase to between 25 millimetres and 75 millimetres within a 24-hour period.
The agency also warned residents to prepare for widespread rainfall, thunderstorms, strong winds, increased water levels, saturated soils, ponding in low-lying areas and reduced visibility during intense showers.
Hydromet said the severe weather could lead to localised flooding, hazardous driving conditions due to water accumulation on roadways, disruptions to outdoor activities and possible damage to infrastructure.
The bulletin further noted that lightning, gusty winds and even uprooting of trees are possible during thunderstorms, while some areas could also face potential mudslides.
Providing a meteorological analysis, the agency explained that a tropical wave along 60W near the Windward Islands remains almost stationary and is enhancing deep convection across the region.

“A tropical wave along 60W is approaching the Windward Islands south of 16N, and is almost stationary,” the bulletin noted, adding that atmospheric conditions are expected to weaken briefly on May 21 and 22 before strengthening again afterwards.
The National Weather Watch Centre said it will continue monitoring the evolving weather system and issue additional bulletins if necessary.