A toxic algal bloom impacting marine animals has been observed along the Southern California coast in late April 2025, according to experts. The event, producing the neurotoxin domoic acid, has resulted in the most severe dolphin stranding associated with a toxic algal bloom ever recorded in the region.
A severe weather outbreak is forecast across parts of the Midwest and Upper Midwest on Monday, April 28, 2025, with threats including large hail, severe wind gusts, and strong to intense tornadoes, according to the NWS Storm Prediction Center (SPC). The greatest risk is expected across southeastern Minnesota, northeastern Iowa, and southwestern Wisconsin, including cities such as St. Paul, Des Moines, and Cedar Rapids.
Record rainfall triggered flash floods in Omaha, Nebraska, on Thursday, April 24, 2025, as severe thunderstorms moved through the state. Omaha recorded 64 mm (2.5 inches) of rain, surpassing the previous daily record of 43 mm (1.7 inches) set in 2007. Large hail and a couple of tornadoes were also reported during the storms.
Large hail up to 12.7 cm (5 inches) in diameter and a large tornado struck Matador, Texas, on Thursday, April 24, 2025, as severe storms moved through the central United States, triggering multiple tornado warnings across the region.
A strong and shallow earthquake registered by the USGS as M6.3 hit near the coast of Ecuador at 11:45 UTC (06:45 local time) on April 25, 2025. The agency is reporting a depth of 35 km (22 miles). EMSC is reporting the same magnitude and depth.
A Red Alert was issued for Poás Volcano National Park in Costa Rica on Wednesday, April 23, 2025, after a series of eruptions produced ash plumes reaching up to 4 500 m (15 000 feet) above the crater. Ashfall was reported in several surrounding areas, prompting Orange Alerts in Grecia and Sarchí, and Yellow Alerts in Alajuela, Poás, Naranjo, Río Cuarto, and Zarcero due to increased volcanic hazards.
Severe weather swept across the central U.S. on Thursday, April 24, 2025, spawning over 16 tornadoes in six states, with 10 being reported in Texas alone. Large hail of over 114 mm (4.5 inches) was also reported in multiple areas as storms passed over the Central and Southern Plains.
A brutal heatwave has gripped Telangana this week, claiming 11 lives in just 24 hours and pushing temperatures past 45°C (113 °F). With large parts of India also facing extreme heat, alerts have been issued, and hospitals are reporting a sharp rise in heat-related illnesses.
A slow-moving frontal boundary is forecast to trigger thunderstorms across the Central and Southern Plains of the United States on April 24, 2025, with risks of severe weather including large hail, strong wind gusts, and flash flooding. The system is expected to shift southeast, extending the storm threat into the Mississippi and Ohio Valleys, and eventually the Northeast and Southeast through April 26.
A strong explosive eruption took place at the Bezymianny volcano in Kamchatka, Russia, on April 23, 2025, sending an ash plume 11 km (36 000 feet) above sea level. As a result, the Aviation Color Code was raised to Red.
