Amber heat-health alerts were in force across most of England as temperatures began to climb again, with forecasters warning of high and potentially extreme heat through the week.

The UK Health Security Agency (UKHSA) said significant impacts are likely across health and social care, including a possible rise in deaths. The alerts remain in place until Friday evening.

Temperatures were expected to reach the low to mid-30s Celsius across much of England and Wales at the peak of the heatwave.

On Tuesday, the hottest conditions were expected around eastern Wales, the Midlands and central parts of southern England, where temperatures were forecast to reach 27°C to 30°C.

Drought conditions

The warnings come as drought conditions spread across England. The National Drought Group said on Monday that 71.3 percent of England was now officially in drought, with the East Midlands, Lincolnshire and Northamptonshire, Kent and East Sussex, and Solent and the South Downs the latest areas to be affected.

About 45 million people are living in drought-hit areas, while more than 27 million are subject to water restrictions, according to the group.

The UK has experienced an unusually warm summer, with temperatures remaining above average for much of the season. Even cooler spells have generally only brought temperatures back towards the seasonal average.

Little or no rain is forecast across England and Wales for most of the week. The first significant rainfall for many areas in almost two months could arrive on Sunday, when low pressure and rain-bearing fronts move in from the Atlantic across Wales and southern England.

The rain, however, is not currently expected to be particularly heavy or persistent.