rain

There is a risk of significant travel disruption during what is predicted to be the busiest Easter weekend in four years for drivers.

Bridges could close and ferry services may be cancelled, with possible delays to planes, trains and buses.

Rough seas and large waves will bring dangerous conditions around the coasts.

Parts of north-west Scotland are also covered by a Met Office yellow warning for rain and snow.

At low levels, especially in the Western Isles and Skye, up to 50mm (2in) of rain could fall with the potential for flooding.

Meanwhile hills and mountains above 200m (650ft) are likely to see snow, with 5-10cm (2-4in) expected to accumulate, and a small chance of 20cm (8in) in a few places.

Coupled with the strong winds this could give blizzards, snowdrifts and very poor visibility on the roads.

At least 28 people are killed in Afghanistan and 17 in Pakistan after heavy rainfall causes severe flooding.

Heavy rain that has caused severe flooding and landslides has killed at least 45 people in Afghanistan and Pakistan over the past five days, authorities say.

Afghanistan’s National Disaster Management Authority (ANDMA) said on Monday that 28 people have been killed in the floods and 49 injured with more than 100 homes destroyed.

Most of the deaths in Afghanistan were reported in central and eastern provinces, including Parwan, Maidan Wardak, Daikundi and Logar, according to ANDMA.

The authority added in a statement that weather conditions remained “unstable” in parts of the country and there is a continued risk of more rain and flooding in some areas.

“In total, 1,140 families have been affected,” ANDMA said.

Police spokesperson Sediqullah Seddiqi told the AFP news agency a 14-year-old boy died after being struck by lightning in the northwestern province of Badghis.

He added that in the same province, three people had drowned while trying to gather driftwood to be used for heating.

At the same time in Pakistan’s Khyber Pakhtunkhwa province, which shares a border with Afghanistan, 17 people were killed and 56 wounded, the Provincial Disaster Management Authority said.

Extreme weather

Heavy rainfall has continued to sweep across Afghanistan since Thursday, causing floods and landslides in multiple provinces.

The weather prompted the closure of several highways, according to officials in central and eastern Afghanistan. Further rains and storms are forecast for Tuesday.

Afghanistan’s National Disaster Management Authority has warned citizens to refrain from using “rivers and flooded streams, and follow the weather forecast seriously”.

In the central province of Daikundi, the local disaster management department said a five-year-old was killed when a roof collapsed. A woman was also killed in the same circumstances in the eastern province of Nangarhar, police spokesperson Sayed Tayeb Hamad said.

Afghanistan is vulnerable to extreme weather, particularly heavy rainfall and monsoon seasons, which trigger floods and landslides in remote areas with fragile infrastructure.

In January, flash floods and snowfall caused the deaths of at least 17 people and killed livestock.

Imagine waking up early, eager to peep dazzling carpets of brilliant orange flowers at the Antelope Valley California Poppy Reserve. Instagram posts promised a spectacle.

You drive to the reserve north of Los Angeles, but the rolling hills aren’t alive with color.

Bummer. The bloom is over.

Thanks to AI, and a local scientist, such disappointment may soon be a thing of the past.

This year, Steve Klosterman, a biologist who works on natural climate solutions, launched a “wildflower forecast,” powered by a deep-learning model, satellite imagery and weather data.

In a sense, Klosterman, of Santa Monica, developed the tool to meet his own need.

Last spring, the Midwest transplant was hankering to see some wildflowers. He assumed there was some online resource that offered predictions or leveraged satellite images.

“Surely, there must be something,” he recalled thinking. “But there was nothing.”

There are tools. The state reserve operates a live cam trained on one swath of land. Theodore Payne, a California native plant nursery and education center, runs a wildflower hotline, where people can call in and hear weekly recorded reports on hot spots.

“These are all essential resources,” Klosterman said. “At the same time, they’re limited.”

Klosterman isn’t green when it comes to plants. His PhD, at Harvard, focused on the timing of new leaves on trees in the spring and color change in the fall.

For a class project, a team he was part of built a website that predicted those leaf changes in the Boston area. It was a hit.

California poppies bloom in Lancaster, near the state natural reserve, in mid-March.

(Kayla Bartkowski / Los Angeles Times)

To create the poppy bloom predictor, Klosterman turned to AI initially developed for medical imaging. He has harnessed it to instead analyze satellite images of the Antelope Valley.

The model scans 10-by-10-meter squares of land to determine whether poppies are present by their telltale orange color. (It also identifies tiny yellow flowers called goldfields.)

The model is trained on satellite images — which go back nine years — along with past weather data.

It then uses the current forecast, and recent flower status, to peer into the future.

If the mercury is going to hit 100 degrees and wind is picking up — and in previous years that led to withering flowers — that will guide the prediction.

Right now, the model can forecast five days out and is, as Klosterman puts it, “very much a work in progress.” It would be better, more powerful, if it had 100 years to learn from.

As more data are collected, it might someday be able to forecast a week or two out.

Right now, poppies are popping at the reserve in the western Mojave Desert.

It rained throughout the fall and into winter, and poppies need at least seven inches of rain to make a good showing, said Lori Wear, an interpreter at the reserve.

Snowfall in January seems to push them to another level, but that didn’t happen this season. So it’s a good bloom, but not extraordinary, she said.

Still, poppies — California’s state flower — blanket swaths of the protected land.

“It almost looks like Cheeto dust,” she said, “like somebody had Cheetos on their fingers and just smeared it on the landscape.”

Poppies here have typically peaked around mid-April, but variable weather in recent years has made it hard to predict, she said. Klosterman believes right now is likely the zenith.

Also blooming now: goldfields, purple grape soda lupine and owl’s clover. Wear described the latter, also purple, as looking like a “short owl with little eyes looking at you and a little beak.”

An SUV drives through blooms near the reserve. “It almost looks like … somebody had Cheetos on their fingers and just smeared it on the landscape,” said Lori Wear, an interpreter at the reserve.

(Kayla Bartkowski / Los Angeles Times)

On Sunday, Klosterman experienced the blooms for himself, using his technology as a guide.

It offers predictions in two forms. The first is the amount of the valley — shown in a satellite image — covered in poppies and goldfields, expressed as a percentage. The other is an overlay of orange and yellow splotches on the land.

The map showed a fairly high concentration of poppies near a stretch of Highway 138. He went there and, lo and behold, vibrant flowers awaited him. He sent proof: a smiling selfie in front of a sea of blossoms.

Klosterman’s tool may help answer arguably more complex questions than poppy or no poppy, such as a more precise understanding of the conditions the flowers need to thrive.

Experts know rain is key, but it’s more complicated than that.

Steve Klosterman takes a selfie in a field of California poppies.

(Steve Klosterman)

Heavy rain can supercharge invasive grasses, crowding out the blooms. Natives actually tend to do better after several years of drought, once invasives not adapted to the arid climate die out. That’s what led to an epic superbloom in 2017, Joan Dudney, an assistant professor of forest ecology at UC Santa Barbara, told The Times in 2024.

Klosterman wondered if the recent heatwave would desiccate them. But his model didn’t show that, and neither did his trip. So it’s possible other factors play a significant role in their persistence, such as length of day.

The model could also shed light on what could happen to the flowers as the climate warms. Will they migrate to the north? Will there be fewer blooms?

To game that out, Klosterman said you could invent and plug in a weather forecast with higher temperatures.

For now, Klosterman’s forecast is limited to the Antelope Valley. But if it expands to other areas, and other flower types, it could help people like Karina Silva.

Silva woke up at 5 a.m. last Wednesday to travel from her Las Vegas home to Death Valley National Park, hoping to beat the heat and the crowds to the superbloom.

But several hours later, she and her husband, David, were still trying to find it.

The hillside behind her was sprinkled with desert golds, but the display fell short of the riotous eruption of flowers posted on social media. The superbloom ended in early March, according to park officials.

“I was just thinking it was going to be this explosion of different colors,” Silva said by the side of the road overlooking Badwater Basin.

The World Health Organization has warned that “black rain” caused by Israeli strikes on Iran’s oil facilities could pose health risks, especially for children. Iranian authorities have advised residents stay indoors as fires and thick smoke worsen air quality.